Standing

Want to add she’s also not sitting up by herself, or pulling to stand

Perhaps check with the health visitor

I’d agreed with seeing a health visitor, especially if not sitting yet. It could be she might be hyper-mobile so takes a little longer for them to get the coordination etc

You will most probably need to visit a neurologist. Mine didn’t sit at 11 months and it turned out he has low muscle tone (which can be a symptom of a lot of different things, or nothing at all). We are doing genetics tests now to see if there’s a reason behind, meanwhile physiotherapy helps massively.