Milestone check in... worried...

My almost 10 mo only army crawls right now and can sit unassisted. He will/can not push himself up into a seated position.

He’s super uninterested in climbing but will put weight on his legs if held in a standing position...

I feel like he just rolls around a small area all day long and I’m looking for similar babes and any tips on how to increase his movement.

Maybe expand the play area more? But what else? 🤔