Is this wrong? Advice please

My friend has a 8 month old baby that’s really only eating formula and sometimes 1-2 times a week baby food. She thinks this is okay and she’ll try to introduce foods after he turns 9-10 months old. She said formula/breast milk is the main thing babys need until 1 year old. Baby is very healthy but I thought babys need other food way before 1. Is she starving her child? Is this wrong?!?

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