My wife has been vegan for about 10 years now, and vegetarian since childhood. Our 2 boys are vegan, and have been since birth. (I’m not although I was vegetarian for about 7-8 years.)
She is a very good person to talk to about these things - it’s not difficult to have a vegan household in this day and age, and our kids are super healthy (we’re careful to ensure they get the right nutrition etc). There are a very (very) limited number of important things which we can’t do without which are not vegan (basically certain medications which did not come in a vegan option like Vit K2 at birth) which we make exception for, but by and large most things have a vegan substitute.
She’s on here somewhere too - I’d have to find her username but I’m sure she’d be happy to help.
EDIT: sixfootredhead is her username. Don’t know if she checks messages but why don’t you send her a message. I will let her know about this thread.