Point to me where anyone or anything is implying his marriage is invalid. If that were the case, why would him being on a dating app even matter, he’s already openly gay and this whole thing would be a non-issue, other than “Ahh spooky gay man!” which everyone already knows.

You’re projecting your own internalized homophobia here. You’re seeing “matched with a man” and are projecting a negative bias when it is merely a factual statement.