Only army crawling...skipping crawling on hands and knees?

Has anyone’s baby only army crawled but never went on to crawl with their stomach off the floor? My baby had been army crawling for a whole month already but it doesn’t seem like she’s gonna crawl on her hands and knees anytime soon....She’s almost 9 months old.

Anyone experience this?

I know some babies skip crawling altogether. I’m not asking about that. I’m asking about going from army crawling to walking