9.5 month old won’t pull up to stand

L

Hey everyone, I know I shouldn’t compare but my other two kids were walking by 10 months and I know that’s very early but I’m just starting to get a little worried. My middle is 9 years old so a lot of this is kind of a blur for me.

My baby crawls and stands up on his knees. Is anyone else’s baby not pulling themselves up yet to stand? Any tips welcomed.😊