@tamayers This would be nice to have, for sure.
For the most part though, the domain registrar will handle that part of forwarding a full domain to another if you use their own DNS servers, etc. I have done that for a couple of my own domains that I had registered a long time ago for 10 years, but no longer use them so wanted to just forward them to my current ones instead.
It would certainly be convenient for Cloudron admins if Cloudron did this too though. One example I can think of... I have two vanity URLs purchased by two different clients of mine where they want me hosting their email but for the website they want it going to their realtor agency website (for example) which is outside of my control, and would be convenient to set it all in the same space instead of a mix of domain registrar and Cloudron.