Solids struggles

So my baby girl was born May 1st so Dec 1st she’ll be 7 months. She absolutely refuses refuses any solids. I can barely get one spoon of a taste. I’ve tried: sweet potatos, squash, peas, banana, avocado, apples, mango, banana in puree form. I’ve also given her bites of food to self feed to see if she’d rather and she won’t even try it. I’ve also intentionally ate in front of her for months now so she could watch me eat. She also absolutely refuses formula (I first tried right at 6 months. I offer her two ounces a day everyday since and she will not take it). So basically she will only take breastmilk and NO food at all. Is this normal? I know I should keep trying on the daily but it’s so much time and waste of food when she won’t do it. Should I just wait a few more weeks and try again?