If you want to add a badass volume control #15
Description
https://github.com/kdschlosser/mp_lvgl_widgets/blob/main/mp_lv_widgets/knob_ctrl.py
That code is written for LVGL 9.0 so it would need to be updated to work with 9.4. specifically the canvas widget portions. I am sure there will need to be some other things that need to be adjusted as well.
You can speed things up if you use the native code emitter in MicroPython around some of the math functions that get called a lot. I did cache as much as possible.
This is what the knob looks like...