I feel like my baby is falling behind..

She’ll be 7 months in a week and feel like she should be doing more. I know babies develop at their own rate but I guess I’m just a worried FTM. I See all these posts about babies younger than her crawling, saying dada and mama, trying to walk in their walker. She can’t do any of that. All she can do is sit up, she loves to stand but has to be supported and hates baby food! She can roll over but only from her back to her tummy and she rarely does that.😕