Baby 7 months and not eating solids

Hello new to this app. My 7 month old baby girl is exclusively breast fed. My two boys the longest I breast fed was 2 months. I never had problems introducing them to baby food they always loved eating but my daughter is another story. I’ve tried vegetable baby food, fruit baby food, baby oatmeal with breast milk, avocado, orange and watermelon in mesh, mashed potato and rice and gravy. Only thing she even liked was avocado and baby food peas. Every time I feed her she’s shutting her mouth tight. I’m at a loss of what else to do!!!