The following shows how to configure an app to use Codeberg as the update source, for Gear Lever 4.+.
Let’s use https://codeberg.org/sonusmix/sonusmix as an example.
Repo
This should be a string in the form of username/repo on Codeberg, without addiitonal parameters:
sonusmix/sonusmix
Release file name
This should be the name of the file from the relases tab; you can use globe (*) patterns to indicate variables in the file name.
org.sonusmix.Sonusmix-*.AppImage
Pay attention as may apps today have relases for x86_64 and arm64 platforms.