Hello everyone! Question for moms, after 40 days of daughter's hair was…

Hello everyone! Question for moms, after 40 days of daughter's hair was shaved, she was born with hair, now there is hair on the sides and in the nape not growing (I am worried now, I give her vitamin D3, I don't take vitamins yet, have you encountered such things, and what should be done? The roots are there but the hairs are not rushing out).