There are topics that are about the use of graphics tablets on Linux in this forum so you could search for those with the appropriate keywords.
e.g. '“Linux Huion”, “Linux tablet”, etc.
e.g:
Best stylus to use with linux
and:
There are drivers available for Huion on Linux.
Wacom drivers are built into Linux so that is an easier start for Wacom.
Krita is developed on Linux so yes, it is and always has been stable on Linux.
People run krita on all kinds of distros. The KDE desktop environment has an advantage (I believe) with some tablet setting facilities available for it it but someone else will be able to tell you much more about that.
I’ve used the krita appimage on Linux Mint (previously) and now on Debian for long periods of time with no problems but I have a Wacom tablet.