If you are not already using it, https://github.com/ImranR98/Obtainium, it’s updated and improved frequently
‘Get Android App Updates Directly From the Source.’
Currently supported App sources:
Open Source - General: GitHub GitLab Codeberg F-Droid Third Party F-Droid Repos IzzyOnDroid SourceForge SourceHut Other - General: APKPure Aptoide Uptodown APKMirror (Track-Only) Huawei AppGallery Jenkins Jobs Open Source - App-Specific: Mullvad Signal VLC Other - App-Specific: Telegram App Steam Mobile Apps Neutron Code “HTML” (Fallback): Any other URL that returns an HTML page with links to APK files