i was more reffering back to the general discussion around this character being "dont claim this is transgender/dont categorize this person" than you specifically
Dunno if some posts got deleted or something but I'm not seeing anyone saying anything like that here. I've certainly seen it happen plenty of times on this forum, most recently with "The Guy I Liked Wasn't A Guy At All" and people being weirdly aggro towards anyone with a trans interpretation of Mitsuki. But I've not seen anything like that for My Dear Lass.
Also if you interpret the character's physical depiction as having a more feminine silhouette (and I do at least) then it poses a question about which of these is more likely:
1) a transfem kid in China got HRT but her queer family members do not respect her gender identity, or
2) a transmasc kid in China does not yet have access to any sort of transition care but his queer family members at least respect that he's a little brother instead of a little sister.
2 seems more plausible to me. But I think we'll probably find out the answer as soon as the next chapter is out, lol.