In my Angular project, some Material icons don’t seem to be rendering:

<mat-icon>domino_mask</mat-icon>
<mat-icon>hourglass</mat-icon>

The other icons render normally. I have tried the following steps to resolve the issue:

1. Cleaned the node_modules directory and re-ran npm install.
2. Updated Angular Material using ng update
3. Verified that MatIconModule is imported in my module.
4. Checked that the tag for Material Icons is present in my index.html:

<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">

Despite these efforts, the issue persists. Any advice on what might be going wrong or additional steps I could try would be greatly appreciated.

Thank you!