Change thumnails/AVD picture in Windows App

I was looking for this too.  I vote for custom icons.  Would be nice and looks like it's something that should be possible.

This does not support custom thumbnail images or icons but something you can do instead:

1. Use Custom Display Names
You can set a friendly name for each AVD desktop pool or host pool:
•    Go to Azure Portal → AVD → Host Pools
•    Edit the Display Name under Properties
•    This name appears in the Windows App and can help distinguish desktops
2. Organize by Workspace
If you manage multiple environments, consider:
•    Creating separate Workspaces for each group
•    Assigning users to specific Workspaces based on role or region