The account was set up in Ft. Lauderdale where Moreno's parents lived so the intern excuse is probably a lie. I wouldn't assume this will go away because if he's been on these apps and people have taken screenshots then it will come out.
Tbh honest though say the story does evolve and it's shown he was genuinely active on that app to find "friends", would it really matter? A significant chunk of the right has become accepting or at least relatively passive around homosexuality, and most of the far-right folks who might actually care about would still vote for Moreno over Brown just because Trump says so.