Context is important.
At the end of the day, “female” is just a word like any other word. It can certainly be used in a derogatory way (which I think the original Reddit post was) or it can be completely benign.
Generally speaking, when someone precedes “female” with “a” in front of it, I side eye them a little.
I don’t see any posts actually.
EDIT: Never mind. Now I can see the posts. Must be an app thing.