Can Apple TV be used as a thin client?
No, that is not possible - there's no mouse support on the AppleTV.
There are remote desktop apps for AppleTV, such as the &quot;Remote Desktop for TV&quot; app. However it does not support a Bluetooth mouse, and requires you to use the Apple Remote as a pointing device. That can be done in a pinch, but not for ongoing software development work.
Note that the &quot;Remote Desktop for TV&quot; app requires an RDP server, which you will typicak find on Windows. If you run macOS on your MacBook Pro, you'll typically want a VNC client instead.