Out of curiousity I checked my BMI.
Turns out I’m obese.
Then I calculated my weight pre kids (22 kgs lighter and a size 6 with what would be considered a “great body” sunny but with light abs and a booty) the big difference is my boobs, before kids I was barely an a cup I’m now DD. (Naturally)
Me at size 6 was apparently not even on the light sight of “normal range” I was towards the heavier side of normal lol wtf.

I wouldn't worry. Children have lots of growth spurts. They get taller as they get older which naturally makes the BMI lower.

BMIs are bullshit. My husband has a great body but his BMI says he is overweight. Not even close.

It's shit like this that leads to eating disorders in our kids. Don't let the nurse trick you into thinking your child is overweight

BMI for kids is bullshit, PLEASE ignore that school nurse, and honestly consider reporting them higher up (e.g. to your state's health ombudsman). They're not your child's primary health care provider, surely a school nurse should be tending to scrapes and bruises, not giving their 2 cents about your child's weight? If you're concerned about your child's height and weight then talk to your child's GP.

I’m not even sure children are supposed to have their BMI measured.

I don't believe in BMIs. It's a load of shit. If your kids are healthy, active and in a healthy weight range, that's all that matters

No. BMI doesn't take into account build and muscle mass. Also, he's a kid, he's active and doesn't look fat. This really riles me up. If he's like my daughter, he'll stretch out, then get almost a bit chubby again before a growth spurt.