Murena released a tablet with /e/OS, and it's also possible to install it on other tablets. It's still quite early after the release so I am not sure there will be reviews from artists on their specific use of the tablet but you can consider it another option.
Edit: didn't UBPorts release a tablet version of Ubuntu Touch?
Yeah I'd recommend Magic Earth as well, I use it practically every day. I tried many other apps and it's annoying that this one isn't FOSS but I needed something that actually works