Obtanium Supported sources include (source from the app) :

GitHub (Searchable from the app)

GitLab (Searchable from the app)

Codeberg (Searchable from the app)

F-Droid Official (Searchable from the app)

IzzyOnDroid

F-Droid Third-Party Repo

Jenkins

SourceForge

SourceHut

APKMirror (Track-Only)

APKPure

Mullvad Signal

VLC Telegram App

Steam

NeutronCode

HTML

You just need to add the desired app link to the app(obtanium). it’s pretty neat

You can also use Obtanium and add all of them to track the update