I feel like a Samsung tablet would work really well there. DeX for your desktop work with Termux and the like and Android for the rest. I know people say Android has no tablet apps and while it's definitely missing stuff like Procreate it is still good for web browsing, watching streaming services etc. And Samsung's version of Android is very good at multitasking allowing things like having 4 apps running split screen, windowed apps etc. Way better than what iOS allows.