Galaxy Tab devices work fine IMHO - I have a Galaxy Tab S6 and use it for many thing, including quite involved digital drawing with the desktop level Clip Studio Paint. It has a very good keyboard cover and can be easily connected to a full screen and keyboard/mouse with a HDMI dongle, which makes it switch to the desktop style DEX interface. You can also combine this with the Wacom One drawing tablet and get a really nice and flexible mobile drawing workstation.

Also in the future Steam Deck might actually fit the category! Like if you don't mind the extra knobs and controls it's basically a fully supported Linux tablet! :)