https://github.com/H-M-H/Weylus #weylus turn any phone or tablet to graphical planchet . works cool with
#obsidian #escalidraw . test on my
#boox. nice and written in
#rust 
GitHub - H-M-H/Weylus: Use your tablet as graphic tablet/touch screen on your computer.
Use your tablet as graphic tablet/touch screen on your computer. - H-M-H/Weylus
https://excalidraw.com/ is amazing whiteboard and visual thinking tool and have cool
#obsidian plugin. Try
#escalidraw 
Excalidraw — Collaborative whiteboarding made easy
Excalidraw is a virtual collaborative whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
vp