I agree it’s down to marketing.
Perfumes are aimed at males and females (for him…for her).
I mentioned toiletries because it’s something my dd mention as a lot. I went into boots to try and find her a gift set but found it all the female oriented products are pink or floral (look and smell), all the body spray sets seem to have pictures of lips (so etc…) and all the male gift sets are darkly coloured, come with shaving products. The only in between is the Harry Potter range but my dd grew out of HP years ago. Yes there are gender neutral beauty products but they come in white bottles which are pretty boring. My dd has ASD, she likes colourful things, she’s very much a female but doesn’t like pink floral type things and prefers things that don’t have “for him…or…for her” on them.
Most of DD’s friends shop in primark, newlook, etc… where as dd struggles to find things she likes in those shops, she does find the odd thing she likes. She buys things from the men’s and woman’s sections depending on what she likes the look of.
It’s not really about there not being any gender neutral things, it’s about the fact lots of things are labelled as being for males or females.
I wore lynx and brut as a teen 🤣, I’m not trans or gender neutral, it was kind of trendy at the time to wear something that wasn’t meant for girls. Things seem to be much different now and everything seems to be labelled due to your personal choices.