Not that I know, my reference was meetings with people from the Deno team (many of whom are friends) - I'm not sure it's documented but it can easily be verified. Just try to do `Deno.connectDatagram` on deploy for example and see it's missing.
Under the hood Deno Deploy is just Deno with scale built in. It's obviously not a simple soundbite but I recently built the new Deno.serve API implementation and the same code effectively runs in the CLI and Deploy modulo what's necessary to get it working in the Deploy environment.