Mine also weighs 21 lbs—has been for some time now. He’s not a, big portion eater, but loves to eat and try’s everything. My ped tells me his weight tracks for within his percentile.
Literally had my son 15m check up yesterday hes 22lbs so same. But hes also a picky eater at times other times he eats ALOT
My son weighs that exact weight and eats like a beast