A couple of things I forgot to mention once you open stadia controller.exe
1. you must leave it open in order for it to keep working
2. ViGEmBus has to be 1.16.116
3. Stadia controller.exe has to be version v1.3.1
https://github.com/ViGEm/ViGEmBus/releases/download/setup-v1.16.116/ViGEmBus_Setup_1.16.116.exe
https://github.com/71/stadiacontroller/releases