And I invite Discord devs to make their “communities” indexable.

C++ is also the standard in game dev. You may see some C# here and there, but most engines, public available or otherwise, are built on C++.

If it is a AAA game, I can assure you it is most likely made with C++.

Professionally: Unreal Engine 5 Hobby: Godot and Unreal Engine 5

Godot is fun, quick and small. Unreal is powerful, bulky and big.

No and if I remember Unreal Marketplace License coreectly, that be also breaking the license.

There is! Sometimes a bit buggy as it stops downloading files, but restarting it resumes the download:

https://assetmanager.studio/