My 10 month old doesn't like standing up! It's starting to worry me more like he will stand with his…

My 10 month old doesn't like standing up! It's starting to worry me more like he will stand with his hands on the couch but he won't like side step to one end or the other. If that makes sense. Is this normal? He was born early and was in Nicu for 1 month but so far he's been advanced with everything. He says "dada", "sister", "hey" but no mama 😢