UI loading before set value of a variable in subsribe in angular

 `isReqReviewSelected: boolean = false;`

ngOnInit() { this.getIntProgReviewCommentsById(this.selectedAgendaId); console.log(Reviewe:'+this.isReqReviewSelected); //Always false - Ui render before value set }

`getAgendasById() {
    this.agendasService.getAgendasById(this.selectedAgendaId ?? 0)
   .pipe(takeUntil(this._destroying$))
   .subscribe({
    next: (res: any) => {
      this.agenda = res;
      this.eventId = res.eventId;
      this.isReqReviewSelected = this.agenda.reqReview ?? false;
      console.log('est' + res.reqReview); // Here the value got changed
    },
    error: (err) => {
      console.log(err);
     }
      }
      );
  }`

<ng-template pTemplate *ngIf=”isReqReviewSelected”> //Always false

I tried with return type of observable but not worked