I didn't get the memo?

Did I miss something? I'm a ftm my lo is 7 months old and she has only had breastmilk, oatmeal, various stage two foods, wheat puffs, and a taste of peanut butter. I have a few friends who also have 7 months old and they have given their lo pizza, mac and cheese, ice cream and McDonald's nuggets. They all laugh and ask me if I have my lo on a diet? Ummm no? Did I miss something? Can babies have everything now that they are 7/8 months old??? Serious question. If so, I didn't get the memo 🙄