XPpen also has their own tablet drivers and is 5x the value of wacom. Wacom is the apple of drawing tablets and has been riding their own coattails for like 10 years charging ridiculous prices for old models without doing any innovation.
I think Huion also has Linux drivers now too, though their latest H1061P tablet has a hardware issue with bad pressure sensing.
Though OP was looking more for a standalone PC 2 in 1 tablet with a touchscreen that doesn't have to be plugged in at all.