Anyone know what’s going on with VLemmy.net?

Yeah, saw this one. Could be many reasons it’s parked. Could’ve been doing maintenance, migration, missed a renewal, etc. Doesn’t mean it’s gone. Any DNS updates may be subject to TTLs as long as an hour or more (not usually but you never know), and that’s from whenever the update to DNS has been committed by the name servers, and then actually begins to propagate to other servers.