How to use the @ngx-formly/core.FormlyModule.forChild function in @ngx-formly/core

MatDialogModule,
  MatSidenavModule,
  DragDropModule,
];

@NgModule({
  imports: [
    SharedModule,
    BreadcrumbsModule,
    [...matModules],
    AppConfirmModule,
    TruncateModule,
    HelperModule,
    ToolbarModule,
    QuickpanelModule,
    FormlyModule.forChild({}),
    FormlyMaterialModule,
    RouterModule.forChild([
      /* {path: '', pathMatch: 'full', component: InsertYourComponentHere} */
      {
        path: '',
        component: AdminLayoutComponent,
        // canActivate: [AuthGuard],
        canActivate: [AdminGuard],
        data: { title: 'Admin', depth: 1, roles: ['ROLE_ADMIN'] },
        children: [
          { path: '', component: OverviewComponent, data: { title: 'Overview', depth: 2 } },
          {
            path: 'subscriptions',
            component: SubscriptionsComponent,
            data: { title: 'Subscriptions', depth: 3 },
            children: [

import { DropdownModule } from 'primeng/dropdown';
import { FormlySelectModule as FormlyCoreSelectModule } from '@ngx-formly/core/select';

import { FormlyFormFieldModule } from '@ngx-formly/primeng/form-field';
import { FormlyFieldSelect } from './select.type';

@NgModule({
  declarations: [FormlyFieldSelect],
  imports: [
    CommonModule,
    ReactiveFormsModule,
    DropdownModule,

    FormlyFormFieldModule,
    FormlyCoreSelectModule,
    FormlyModule.forChild({
      types: [
        {
          name: 'select',
          component: FormlyFieldSelect,
          wrappers: ['form-field'],
        },
      ],
    }),
  ],
})
export class FormlySelectModule {}

<form>
        
        
      </form>
    `,
    inputs,
    config,
    declarations: [ParentComponent, ChildComponent],
    imports: [
      FormlyInputModule,
      FormlyModule.forChild({
        types: [
          {
            name: 'parent',
            component: ParentComponent,
          },
          {
            name: 'child',
            component: ChildComponent,
          },
        ],
      }),
    ],
    ...config,
  });
};

import { CommonModule } from '@angular/common';
import { FormlyModule } from '@ngx-formly/core';
import { ReactiveFormsModule } from '@angular/forms';
import { FormlySelectModule } from '@ngx-formly/core/select';
import { FormlyFormFieldModule } from '@ngx-formly/kendo/form-field';
import { FormlyFieldRadio } from './radio.type';

@NgModule({
  declarations: [FormlyFieldRadio],
  imports: [
    CommonModule,
    ReactiveFormsModule,

    FormlyFormFieldModule,
    FormlySelectModule,
    FormlyModule.forChild({
      types: [
        {
          name: 'radio',
          component: FormlyFieldRadio,
          wrappers: ['form-field'],
        },
      ],
    }),
  ],
})
export class FormlyRadioModule {}

import { FormlyMatFormFieldModule } from '@ngx-formly/material/form-field';
import { MatRadioModule } from '@angular/material/radio';

import { FormlyFieldRadio } from './radio.type';

@NgModule({
  declarations: [FormlyFieldRadio],
  imports: [
    CommonModule,
    ReactiveFormsModule,
    MatRadioModule,

    FormlyMatFormFieldModule,
    FormlySelectModule,
    FormlyModule.forChild({
      types: [{
        name: 'radio',
        component: FormlyFieldRadio,
        wrappers: ['form-field'],
      }],
    }),
  ],
})
export class FormlyMatRadioModule { }

import { CommonModule } from '@angular/common';
import { FormlyModule } from '@ngx-formly/core';
import { ReactiveFormsModule } from '@angular/forms';
import { CheckboxModule } from 'primeng/checkbox';
import { FormlyFormFieldModule } from '@ngx-formly/primeng/form-field';

import { FormlyFieldCheckbox } from './checkbox.type';

@NgModule({
  declarations: [FormlyFieldCheckbox],
  imports: [
    CommonModule,
    ReactiveFormsModule,
    CheckboxModule,
    FormlyFormFieldModule,
    FormlyModule.forChild({
      types: [
        {
          name: 'checkbox',
          component: FormlyFieldCheckbox,
          wrappers: ['form-field'],
        },
      ],
    }),
  ],
})
export class FormlyCheckboxModule {}

import { FormlyModule } from '@ngx-formly/core';
import { ReactiveFormsModule } from '@angular/forms';
import { FormlySelectModule } from '@ngx-formly/core/select';

import { FormlyBootstrapFormFieldModule } from '@ngx-formly/bootstrap/form-field';
import { FormlyFieldRadio } from './radio.type';

@NgModule({
  declarations: [FormlyFieldRadio],
  imports: [
    CommonModule,
    ReactiveFormsModule,

    FormlyBootstrapFormFieldModule,
    FormlySelectModule,
    FormlyModule.forChild({
      types: [
        {
          name: 'radio',
          component: FormlyFieldRadio,
          wrappers: ['form-field'],
        },
      ],
    }),
  ],
})
export class FormlyBootstrapRadioModule {}

import { ReactiveFormsModule } from '@angular/forms';

import { FormlyMatFormFieldModule } from '@ngx-formly/material/form-field';
import { MatInputModule } from '@angular/material/input';

import { FormlyFieldInput } from './input.type';

@NgModule({
  declarations: [FormlyFieldInput],
  imports: [
    CommonModule,
    ReactiveFormsModule,
    MatInputModule,

    FormlyMatFormFieldModule,
    FormlyModule.forChild({
      types: [
        {
          name: 'input',
          component: FormlyFieldInput,
          wrappers: ['form-field'],
        },
      ],
    }),
  ],
})
export class FormlyMatInputModule { }

import {MatRadioModule} from '@angular/material/radio';

import {FormlyFieldRadio} from './radio.type';
import {TranslateModule} from '@ngx-translate/core';

@NgModule({
  declarations: [FormlyFieldRadio],
  imports: [
    CommonModule,
    ReactiveFormsModule,
    MatRadioModule,
    TranslateModule,

    FormlyMatFormFieldModule,
    FormlySelectModule,
    FormlyModule.forChild({
      types: [{
        name: 'radio',
        component: FormlyFieldRadio,
        wrappers: ['form-field'],
      }],
    }),
  ],
})
export class FormlyMatRadioModule {
}

import {EffectsModule} from '@ngrx/effects';
import {GlobalConfigEffects} from './store/global-config.effects';
import {ConfigSectionComponent} from './config-section/config-section.component';
import {ConfigFormComponent} from './config-form/config-form.component';
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
import {FormlyModule} from '@ngx-formly/core';
import {UiModule} from '../../ui/ui.module';
import {KeyboardInputComponent} from './keyboard-input/keyboard-input.component';
import {GoogleSyncCfgComponent} from '../google/google-sync-cfg/google-sync-cfg.component';
import {FileImexModule} from '../../imex/file-imex/file-imex.module';

@NgModule({
  imports: [
    FormsModule,
    ReactiveFormsModule,
    FormlyModule.forChild({
      types: [{
        name: 'keyboard',
        component: KeyboardInputComponent,
        extends: 'input',
        wrappers: ['form-field'],
      }]
    }),
    CommonModule,
    StoreModule.forFeature(CONFIG_FEATURE_NAME, globalConfigReducer),
    EffectsModule.forFeature([GlobalConfigEffects]),
    UiModule,
    FileImexModule,
  ],
  declarations: [
    GoogleSyncCfgComponent,
    ConfigSectionComponent,