If you want to give the new version a try, you probably want to use #postmarketos with systemd on the phone of your choice.

Note that the new gnome-shell-mobile release hasn't landed in their repos yet, and the systemd integration is also still work-in-progress and somewhat rough. I'm sure the team would greatly appreciate help there!

You can put together a systemd build by following the steps described here: wiki.postmarketos.org/wiki/Sys