Godot 4.0 supporting Vulkan is why I joined this jam :)
I could not find a 4.0 Godot build after a 5 min. search, so I just started messing around with 3.3 lol.
Actually, one of the easiest things in the world is to build Godot from the source.
All you have to do is:
1. Download the dependencies
2. Download the master-branch of the Godot sourcecode
https://github.com/godotengine/godot
3. In the Godot folder, execute the command "scons".
I also made a whole series of videos about how you can program entire games only in C++ directly in the source code.
I can only recommend a look at :)
Regards
ProggerParrot