Yes should be on teensy though it can be attached to Norns / Pi via USB. You can then access - potentially - via browser on the Pi desktop later have the OS just boot into a browser. The screen and controllers would be the issues as you say.
At least the Norns could be a suitable midi router for an attached Anbernic handheld version of M8c - though there’s some issue with needing a USB adapter or bus. Starts to become a bit cumbersome.