very niche use case but i always found it odd that the drawing tablet drivers aren't android friendly on osu!lazer. i have a huion h420x and when i plug it into my device, the cursor shows but the tablet does not connect :'3
Android is not like your standard PC. Tablet drivers rely on being able to exert a certain degree of control of the tablet peripheral. That sort of control is not available on mobile platforms which are a lot more locked down when it comes to what you can and cannot do with peripherals.
I find it very unlikely that fine-grained control over things like tablet input area will ever make it to Android.