Kevvy is an ~*UwU sissy submissive bottom*~, don't forget. If Thea doesn't make the first move, he's just gonna tweet about wanting to kiss him in perpetuity without anything happening. Theo's (this guy's name is actually Theo, let's be real) response sounds like he's waiting for Kevvy to make a move. Or he's awkwardly trying to just play along til he can escape.
Far as whether Theo is castrated, It might be a bit before we're aware of Theo's downstairs configuration since he's the only Tranch-adjacent troon ever to not be on Twitter. So who knows if he can even halfheartedly poke the amhole like Wedge did or if they'd have to go Amhole to Amhole.
That said, Kevvy seems to really only like dicks over vaginas or frankengina, since he's noted not being "able" to have the secks with Jen because she has an Amhole too. I'd bet Theo's still packing at least the pole if not the berries.