The “Compact Brush Toggler”-Plugin from @kaichi1342 has the ability to switch the rotation, which is then controlled by pressure, on and off. If you assign a pressure curve to the brushes you use, you will be able to control the rotation through pen-pressure, a task that can be finicky, and you can enable or disable it with a click of a button, and maybe you can assign a shortcut to this toggle.
If this is enough for you or fulfills your needs, I can not say, I don’t use this option, my fine coordination does not allow me to control it.
It is presented here:
And can be downloaded from GitHub:
I’m nearly sure that there is a plugin, that is able to alter the brush-rotation in steps of 10 degrees, but can not find it, unfortunately.
Michelist