Not interested in food

I have a 10 month old that is NOT interested in eating food or baby food. I have been trying since she was 4 months old. Shell only eat baby cracker, veggie straws and some times cherrios. Im losing my mind ive brought it up to the doctors many of times and they keep saying shes fine. Shes 10 months now and at 1 they move them to cows milk. She can just have that all day 😩😭😩😭 what do I do its so frustrating I try at least 3 times a day. Anyone else have or had a baby like this??? TIA!!