None of the choices made up to this point affect the story in any way.
This is the first we're hearing about Redline's sexual history, there's context in the scene that may show why he's suddenly being more open about that sort of thing ( 🍻 )
I was mostly thrown by the fact that Zander came out to Drayden in a required scene (which felt significant), and then after the other two scenes, we went to the retirement beach party where Red was super casual about being into guys (and he knew Zander was into guys, too, which was a surprise, but treated as a known fact).
That's where I felt like I was missing something. There wasn't a precedent for Red or the MC to be casual about liking guys or admitting it to each other, but suddenly they're talking about it like nothing happened. At least, that's what I read.
Redline is the kind of person to just put that kind of information out there. I was working under the assumption that over the course of the month, they've talked about it to some extent, but it's not really a big deal between them. You do make a point, though, I'll make a note to add that information in an earlier scene.