It is gone now and gives a generic "nothing here"; I have no idea whether the "suspended by moderator" display was some kind of bug, transient state, or whether he's just lying, or both things are true and he just deleted his account after it was suspended.
(Well, his Reddit post doesn't claim his Mastodon account didn't get suspended, so it'd "only" be the omission kind of lie…)
FWIW, I don't understand the logic of deleting the Mastodon account but continuing to post on Reddit… those are both "social media" in my mind…