How to create your own mouse driver that is controllable by software?

Basically, I have this game (Valorant) that is protected by an anti-cheat and it ignores any mouse input coming from software such as SendInput in C++ or Cursor.Position in C#, I have this idea of creating a fake mouse driver that is controllable from code via an API, I can write it in any language even if it's something that I don't know I can probably learn about it in 3 weeks. How do I do it? Everything I found online still uses Windows API.