Not really, since my point is based on Japanese viewers.
Well, I did provide a video of my own that basically annihilates what you had, but if you want further proof, search "星川 リリィ" on Pixiv and see what things are tagged (it's largely otokonoko and other related tags). I take the interpretation of numerous Japanese artists over a couple idiots online, especially because the writers haven't said anything yet.
Oh, so you're going to disregard the dialogue that the writers actually wrote for the show itself that explicitly makes it clear that Lily identifies as a girl and that the others accept her as a girl
While it's been about seven months since I saw Episode 8, that's... not exactly what happened. I'll definitely review it, but that's not what happened. It was actually really ambiguous IIRC, hence the firestorm.
because a couple idiots online decided to misgender her in their art?
If by "a couple idiots online" you mean "basically every Japanese artist after Episode 8 aired", and by "misgender" you mean "operate on the more likely interpretation", then yes.
That's certainly an interesting hill for you to choose to die on in the TDT of all places.
This is such a fucking stupid argument anyway. The only people supporting the argument are, well, idiots with a track record of being wrong and trying to claim that effeminate male characters are ackshully trans women. There's no reason to believe it's different in this case, and as the interpretation of people in the original cultural context is that Lily Hoshikawa is a boy, we should operate with that.