The problem with maintaining unofficial language bindings of any kind is that it's an extraordinarily tedious, unrewarding job. It's hard to imagine many programming tasks which are less fun.
I've done it a few times, and I've learned to steer well clear of either creating or relying on such bindings if at all possible.
The latest active plugin for C#/.NET is UnrealSharp (https://github.com/UnrealSharp/UnrealSharp). They have an active Discord: https://discord.gg/HQuJUYFxeV