Yeah, it's a weird thing. Some readers get very angry if a character doesn't have strong gender presentation perfectly in line with their gender identity.
It's almost like they need to know the gender of a character first, so they can decide up-front things like: "Can I allow myself to think this character is cute/hot, or should I manage and suppress my feelings to make sure I only categorise them as cool/aspirational?"
It's like... "Mate... it's a drawing. If you're horny about the drawing, you're horny about the drawing. Your weird hangups about your sexuality are none of my business. I'm not going to make her more femme-presenting just to assuage your terror at your attraction to a lady who has some boyish elements to her presentation bringing you close to the realisation that you might actually be a bit more attracted to men than you want to admit to yourself."
A lot of people would be a lot happier and a lot cooler if they just acknowledged that they're a little bit Bi/Pan and that it's pretty normal and very commonplace, and just freaking chilled out a bit.