Well that sounds like my dream job, unfortunately this issue in particular is more of a Lemmy problem, not a DNS problem. See: lemmy.nrd.li/comment/190200 for the explanation of why you cant just transfer domains with Lemmy.
Is it possible to move to another domain? - NRDLemmI
I’m curious if I can migrate my instance (a single user) to a different domain?
Right now I’m on a free DNS from no-ip but I might get a prettier paid domain
name sometime.