There are many closed source applications that have been removed from the Google Play catalog for various reasons.
Often this reason is the cessation of further development and maintenance of the application.
Why don’t these people make the code open to everyone if they don’t need it anymore?
This could bring great benefits to all people, but everything that was once created simply disappears.
I can’t tell whether you’re joking or not, but if you aren’t: https://f-droid.org/
Oh! I didnt know that was OS only! Thanks for lmk!
You can also download Droid-ify instead for a nicer interface (backend is still F-Droid)