I’m also going to return an MX Master 3S (to my employer though). I could only fix its weird scrolling behavior with Logitech’s bloatware, still, for the life of me I couldn’t improve the cursor precision on macOS, it’s was simply maddening to use it. Strangely on Linux the precision issue isn’t so bad.

I frequently came across this, but it doesn't work for iPadOS so I never tried it, maybe it would work for you:

https://mos.caldis.me/