I use Authentik, primarily as a local identity provider, but it shows links to all my services (and auto logs-in to supported ones)

Same. My ISP router is sitting on a shelf unused.

Is that why Trump posted on Twitter after his indictment? He needs to establish his landing pad.

Gitea is also claiming to work on ActivityPub soon as well.

https://gitlab.com/groups/gitlab-org/-/epics/11247