Check out example codes for "angular material drag and drop only on button". It will help you in understanding the concepts better.

Code Example 1

<div cdkDropList class="example-list" (cdkDropListDropped)="drop($event)">
  <div class="example-box" *ngFor="let movie of movies" cdkDrag>{{movie}}</div>
</div>

Code Example 2

<div class="example-box" cdkDrag>
  I can only be dragged using the handle

  <div class="example-handle" cdkDragHandle>
    <button class="btn move" cdkDragHandle>
      <mat-icon>open_with</mat-icon>
	</button>
  </div>
</div>

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