Mobian is a version of Debian Linux designed for mobile devices. You can follow the project here:
The official site is at https://mobian-project.org
Mobian currently runs on the Pinephone open smartphone made by @PINE64
p.s. There's a PeerTube video of Mobian running on the Pinephone here:
This is a brand new server run by the main developers of the project as a spin-off of mastodon.social It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!