Smart Pen (xiaomi) : disable annoying buttons functions

Hi everyone !
I’m using Nomad Sculpt with a xiaomi pad 5 with the (so called) smart pen (1st version). This app is basically incredible and works flawlessly on this tablet … except that the pen button gets in the way ><’
There are functions attached to the 2 buttons that I can’t get rid off (a quick note thingy and an incredibly useless screenshot editor). For now, my solution is … to not use the pen buttons at all. And that’s it.
But maybe you guys have any experience with Nomad Sculpt using Xiaomi Smart Pen ? Do you use any fix or 3rd party solution that will promote the use of the pen buttons ?
Thanks for your advices and your help