Speaking as a lesbian, I'm vaguely irritated that BL gets so much focus and a category, while the rest of the LGBTQIA+ umbrella is just like... whatever? I know it's not really Tapas' fault, and they likely made it a genre so that people who like it could find it easily and it didn't gum up the whole romance genre, but the prevelance of it always sort of bothers me, mainly because it so rarely translates into actual support for queer creators and our content based on real experience of being queer?
A lot of it is a sort of fetishisation of hot, young gay men, often by straight women that I find icky in the same way I'm really just not into comics about hot busty lesbians by straight men (like, there definitely are good comics with F-F relationships by men, Gunnerkrigg Court and Homestuck both do really well with non-fetishy, genuinely well-developed, believable relationships between flawed, interesting characters, but then you have... you know... other stuff).
I also don't like it because of the internalised mysogyny that's so obviously in effect in many of these female creators who have no interest in writing stories about women, either because they see female characters only as competition for the male character and therefore a threat or antagonist, or because the media has trained them to believe female characters are inherently uninteresting and instead of thinking "well screw that, I'm gonna write interesting women based on my experience of being one!" they've taken it to heart and instead think "only men can be interesting characters, so I'm just gonna write men and ship them together". The media is flawed and massively biased in favour of male characters in terms of complexity and agency, and instead of trying to fix it, these creators have just embraced that flaw, I guess?
Overall, I don't think it's exactly harmful... but I think a lot of it doesn't really help the queer community or women either. (Obviously there are exceptions, but most of them are made by actual queer people).