@umbrel101 Here are the commands.
To list all installed apps:
umbreld client apps.list.query
To uninstall an app:
umbreld client apps.uninstall.mutate --appId <app-id>
To install an app:
umbreld client apps.install.mutate --appId <app-id>
To start and/or restart an app:
umbreld client apps.restart.mutate --appId <app-id>
To stop an app:
umbreld client apps.stop.mutate --appId <app-id>
To update an app:
umbreld client apps.update.mutate --appId <app-id>