Nice, the GitHub link I posted is slightly cleaned up and orphaned from my actual homelab repo. Not sure if I can use this, because to update these services I need to run systemctl restart, or hope that watchtower eventually supports docker-compose.
So is does your homelab respond to changes in that repo?
As far as I could tell, you can use docker-compose to manage your running of watchtower, but it has issues working with containers that were started via docker-compose: https://github.com/containrrr/watchtower/issues/1019