Is it normal for a 7-month-old baby to still not be able to sit up?

Patient's question:

No

Doctor's answer:

Your child's physical ability is a bit weaker. Pay attention to exercising your child. At seven months, the child should be able to crawl (though some children may not crawl yet, they will walk later), sit steadily, stand momentarily with support, and use their hands to pick up blocks, etc.