Ubuntu uses GDM: https://wiki.archlinux.org/title/GDM
Ubuntu uses GDM: https://wiki.archlinux.org/title/GDM
I always use draw.io
+1 for seedhost.eu, using it for years. It is easy to enable services like Sonarr.
D4 reflection works without battle.net: https://d4reflection.org/
Hide user from login list
The users for the gdm user list are gathered by AccountsService. It will automatically hide system users (UID < 1000). To hide ordinary users from the login list create or edit a file named after the user to hide in /var/lib/AccountsService/users/ to contain at least:
/var/lib/AccountsService/users/username
[User] SystemAccount=true