Add SwitchComponent into your UIComponentsModule class. ui-components.module.ts would look like this

    
import {NgModule} from '@angular/core'; 
import { UiSwitchModule } from 'ngx-ui-switch';
import { SwitchComponent } from './extra/switch/switch.component';

@NgModule({             
imports: [UiSwitchModule],              
declarations: [SwitchComponent]
})
export class UIComponentsModule { }
                    

switch.component.html would look like this

     
<ui-switch [(ngModel)]="enable"></ui-switch>
                            

switch.component.ts would look like this

    
import { Component, OnInit } from '@angular/core';
@Component({
    selector: 'app-switch',
    templateUrl: './switch.component.html',
    styleUrls: ['./switch.component.scss']
})
export class SwitchComponent implements OnInit {    
    enable = true;        
    constructor() { }    
    ngOnInit(): void { }   
}