Baby missing milestones??

Elizabeth

Hey guys. So 1st thing is my DD is semi sitting unsupported for short period of times but not more than a minute usually, and she’s not babbling? Is anyone else in this group? Her pediatrician mentioned that she should be sitting more than she is but gives her an extra month since she was a month early. But, what are your takes on this? I should add she squeals ALL THE TIME! The only time she ever makes any sort of “babbling” is when she’s chewing on something or eating baby food. She will be 7 months on the 10th.