Back in the day most were running it in 1024x768 so the Decks resolution is fine and everything should be readable. The issue is more likely the mouse controls that might be too fiddly with the trackpads. Still tempted to test it though. I'm just really into testing any old PC games on the Deck just to see if they will run. I've only had one game so far that failed to run.

But if running on a modern PC there is the program Exult. This runs Ultima 7 in higher resolution and adds a lot of new features and mods, and upgrades the graphics. Well worth using.