I use a Moto Edge+ (2022) phone that has a feature that allows you to use it as a RDP-like session in Windows. It's called "Ready for PC" and works like any oth

I use a Moto Edge+ (2022) phone that has a feature that allows you to use it as a RDP-like session in Windows. It's called "Ready for PC" and works like any other RDP type session. Copy/paste works, and you can drag & drop files to the desktop. You can also pair the phone to a display (USB-C or USB-C-to-HDMI). With a BT keyboard and mouse, it works like a desktop. You can also use the phone screen as as a trackpad. I beleive this is pretty similar to DeX as you describe. Additionally, it'll connect via BT to a Smart TV to be used as well. There's a couple more modes such as mirroring the Android display, or keeping it to a particular app. You can also use the phone as a Webcam under Windows, but it's a bit laggy.