All the studies that I have read indicate that protein quality is important and children on strict vegan diets do worse on multiple growth metrics. As a layman

All the studies that I have read indicate that protein quality is important and children on strict vegan diets do worse on multiple growth metrics. As a layman on the subject I cannot really give you professional advice, but in my very best estimation is does seem to me, that a healthy diet that includes animal protein is a more cautious approach to one which totally excludes it, assuming the health of the child is being prioritized.