Facing compile time issue for single spa code in angular 16, but the same code working fine in angular 7

[KeerthanaShanmugam2802]

For the below code facing the compile time issue in angular 16 but the same code working fine in angular 7. I trying to inject the external angular app inside the div.

No overload matches this call.
Overload 1 of 2, '(observerOrNext?: Partial<Observer> | ((value: unknown) => void) | undefined): Subscription', gave the following error.
Argument of type '(app: ParcelConfig) => void' is not assignable to parameter of type 'Partial<Observer> | ((value: unknown) => void) | undefined'.
Type '(app: ParcelConfig) => void' is not assignable to type '(value: unknown) => void'.
Types of parameters 'app' and 'value' are incompatible.
Type 'unknown' is not assignable to type 'ParcelConfig'.
Overload 2 of 2, '(next?: ((value: unknown) => void) | null | undefined, error?: ((error: any) => void) | null | undefined, complete?: (() => void) | null | undefined): Subscription', gave the following
error.
Argument of type '(app: ParcelConfig) => void' is not assignable to parameter of type '(value: unknown) => void'.
Types of parameters 'app' and 'value' are incompatible.
Type 'unknown' is not assignable to type 'ParcelConfig'.

import {ChangeDetectionStrategy, Component, Inject, ElementRef, OnInit, ViewChild} from "@angular/core";
import {from} from "rxjs";
import {mountRootParcel, ParcelConfig} from 'single-spa';
import {start as singleSpaStart} from 'single-spa';

@component({
selector: 'single-spa',
template: '<div #testContainer>',
changeDetection: ChangeDetectionStrategy.OnPush
})
export class SingleSpaComponent implements OnInit {
processContext: any;

@ViewChild('testContainer')
shellContainerRef!: ElementRef;

constructor(@Inject("SYSTEMJS") private systemJS: any) {
    singleSpaStart();
}

ngOnInit() {
    from(this.systemJS.import('http://localhost:4203/main.js')).subscribe( (app: ParcelConfig) => {
        mountRootParcel(app, {domElement: this.shellContainerRef.nativeElement});
    });
}

}

Please suggest any solution for this.