Make a GitHub issue, or join their Discord server and make a thread in #config-creation. It's fairly easy to add support for Wacom tablets.

~~Not so sure about display output, though. There are some people who know tablets very well, so you can ask them too.~~ I read about your tablet and I think it will be pretty hard to get display working on Linux. It's not an actual display, but a sign pad, I guess?

Their userspace drivers are not open source yet (and probably will never be)