She is 10 month and she is not crawling or walking

Asli • 24. Married👸.cute baby girl👼23/9/19.

I have see babies 1 month younger than mine and on the move. My baby does not like moving much she started sitting at 5 month 25 days... I like to observe and take note on her milestones. Am I over observing? Is it normal for my baby to be just sitting and rolling around?