<a [routerLink]="['./', {outlets: {'nameOutlet': ['test']}}]"> TEST </a>
<router-outlet name="nameOutlet"></router-outlet>

import { Component, OnInit} from '@angular/core';
import { Routes, RouterModule, Router } from '@angular/router';


@Component({
    selector: 'app-temp',
    templateUrl: './temp.component.html'
})
export class TempComponent implements OnInit {

    constructor(private router: Router ) {}

    ngOnInit(): void {
        this.router.navigate(['./', {outlets: {nameOutlet: ['test']}}]);
    }
}