mat-select set anchor code example
Example 1: mat-select-panel-wrap change position
.myPanelClass{
margin-top: 30px !important;
}
Example 2: mat-select-panel-wrap change position
<mat-select placeholder="Language" disableOptionCentering panelClass="myPanelClass">
<mat-option *ngFor="let locale of locales" [value]="locale">
{{locale}}
</mat-option>
</mat-select>