This has been supported on Samsung devices for years - it was first added to the Galaxy S8 (2017). It's called Samsung DeX. You can plug a phone or tablet into a monitor, keyboard, and mouse, and it gives you a full screen experience.
They have docking stations, but you can also just use a USB C hub.
I've been talking about this for years! I got the idea from razer but I'm imagining the laptop chassis adds a nice screen, enormous battery, better IO, and then it just uses the touch screen as the track pad.