Female/male are used in English as adjectives when describing humans, but as nouns they only refer to animals. “She is a woman” and “She is a female actress” are both okay but calling women “females” is purposefully demeaning and sexist. I do not believe there is any regional difference in this, nor should we really care about such since there are no regions when we’re on a global forum.
And I’m not telling you to, stop putting words in my mouth. Female as an adjective is fine, “female soldier” is fine, calling a group of human women “females”, as in a noun, is demeaning and incel lingo.