itch.io

APIs are what makes developers, like me, happy, so have access to some kind of stuff to build things around will be super fun!
As i said, feel free to can contact me on Discord for that part, but i unfortunately never used Godot or stuff like that x)

Oh forgot about that: about the 2+ monitor support, you cannot crate something that you can select to have OR a setting for all screens OR a setting for each screen individually (i image it just like a checkbox to choose what configuration you wanna use)

I couldn't exactly give a full solution without knowing the source code, but considering  https://github.com/PerfectFox265/Safe4Beta, I presume that hotscreen is built with a similar architecture, i.e. a monolith application where Godot handles most of it and .NET is reserved for specialized tasks, i.e. model loading.

If it's not already, I'd see the easiest path as having the .NET layer act as a server that proxies requests to/from Godot, then it may be as easy as using System.Net.WebSockets and/or perhaps even https://github.com/modelcontextprotocol/csharp-sdk