Can I use SmartView or a USB-C to USB-C cable to transfer the screen of a Samsung Galaxy smartphone to a MacBook and then connect an Xbox controller to my Samsung Galaxy so that I can use the Xbox Gamepass on the MacBook? I know a very specific question. If you happen to have these means, please try it out.
Can be easily implemented with a screen sharing adapter.
You can't use your Mac as a USB Type-C (HDMI) display.
https://github.com/...ile/scrcpy
With this tool you can mirror your smartphone screen to your MacBook. I don't know how good it is for gaming.