I’m forever saying kids develop at their own pace, up to a point. Our little one is saying odd words already whilst her 20 month old cousin is still pointing and ‘mmmm’ing at everything, but the cousin was crawling at the age mine is now and she’s still just pushing herself backwards and getting frustrated. They all have different rates of development for different areas of their growth.
That said, if my little one got to almost 2 and a half and was still looking like buckling at the knees and hips every few steps I’d be taking at least some outline advice.
I’m generally loathe to comment on kids’ appearances or progress etc, I’d rather stick to the fact Ashley is an utter charlatan and a dangerously compulsive liar, but some things become very obvious.