Change Height of Offcanvas using Angular and Bootstrap

the problem is that i cant change die height of the offcanvas "popup". Its works perfekt but for my project i want to have a narrower offcanvas. Can someone explain me, how its done ?

Code: HTML:

<ng-template  #changeOptions let-offcanvas   class=" data-bs-scroll='true'">
  <div  class="offcanvas-body" >
    <div class="btn-group">
      <button type="button" class="btn btn-outline-danger" (click)="offcanvas.close('Close click')"
              aria-controls="collapseExample">
        Abbrechen</button>
      <button type="button" class="btn btn-outline-success" (click)="offcanvas.close('Close click')"
              aria-controls="collapseExample">
        Speichern</button>
    </div>
  </div>
</ng-template>