I think the last time I tried Deno for desktop it didn't allow for fullscreen webview apps. that was a showstopper for our kiosk apps. I'll have to revisit that issue and see if it's resolved now. I'm glad to see Deno continuing to march on.

You may have played with a 3rd party/unofficial solution or similar in the past as Deno Desktop has only just now become available in the Canary branch.