First of all, thanks for working on Krita. I’m not in the target audience, but it’s a great software, and the documentation is really nice.
Anyway, I just want to reprot that the Gaomon PD2200 tablet works fine. I tested it on Windows and Mac OS with the official drivers, and Linux (GNOME Xwayland) without installing anything. The controls are a bit janky on Linux, though: the wheel doesn’t stay open without “Use mouse events for right- and middle-clicks”, and the tablet buttons don’t do what they should. I tried to configure them in the settings, but didn’t get very far.
Anyway, maybe someone can add this model to the list on The List of Supported Tablets — Krita Manual 4.4.0 documentation.