Growth question

Jessica

My little girl will be 8 months on the 17th but she still fits into 0-3 month clothes. 3-6 and beyond are just baggy on her. She’s not skinny, she’s even got lil sausage roll arms. She is breastfed and is taking the solid foods to not much interest. I started with making my own baby purée but have started to just buy the little baby food saueezies as my cooking doesn’t seem to do it for her. I wanted to avoid all the sugars and other not so healthy things that come in pre mad baby food. Does anyone have any tips on prepping food for an 8 month old for the week? And if I should be worried she doesn’t fit into her designated size clothes group?