I took a WaveShare RP2040-Touch-LCD-1.28and made a program to use it as a touchscreen. This is still very much in the beta phase but the proof of concept works. Here’s my GitHub repo for it.
I’m planning on integrating it into my next split near the thumb cluster.
I’ve updated the repo. It now had scrolling (it’s a rotation dial activated by touching the edges of the screen) and mouse coasting (you can flick the mouse across the screen to go faster on the tiny screen)