How can I get Angular Material Icon to show the outline in my Angular app?

You may include this
|Material+Icons+Outlinedin the url to display material icon in outline.

Example:

@import url("https://fonts.googleapis.com/icon?family=Material+Icons|Material+Icons+Outlined");

Then in the template file, you can add in material-icons-outlined

<mat-icon class="material-icons-outlined">home</mat-icon>