Add the following to home screen on Android P https://bgfetch-http203.glitch.me/.

For me, it looks like this https://photos.app.goo.gl/PgoXzAoiBDW4GYXB6.

It should look like the icon declared in the manifest, with masking potentially applied.

The icons in the manifest declare they're happy to be masked using https://w3c.github.io/manifest/#purpose-member.