I don’t think “female” is offensive.
I thought it was offensive because some (supposedly female) users said it was offensive; but I didn’t understand why my female friends used the term (female).
I found another saying that it wasn’t offensive, and I immediate copied that belief.
LGBTQ+ politics is confusing …
It might be offensive to some people, but even if it doesn’t offend it makes you sound like a weirdo. This has nothing to do with LGBTQ+ politics