I've been wondering why my daughter doesn't like laying on the floors or isn't really interested in…

I've been wondering why my daughter doesn't like laying on the floors or isn't really interested in crawling. Asked my fiance and he told me that the doctor thinks Sophia may skip crawling bc of how tall she is and that she's not worried about it either. That would explain today when Sophia wanted to stand on the couch (assisted help) and on the floor (assisted help again), which she took a step and a half and then decided to sit on the floor lol. I'm very proud of where she is even if it's tiny. The reason why i say this is bc her brothers were behind on things and still are, but im proud of all three of them no matter what. All 3 have accomplished a lot. Bc of what my two boys went through I take everything that my daughter does very proudly.