No I don't wear diapers anymore since I was a toddler or baby.
However my kids when they were in diapers have went to amusement parks and have pooped their diaper while at the amusement park.
I have had to change my kids diapers at amusement parks when they pooped their diaper or wet their diaper.
I'm sure many other kids have worn diapers to amusement parks and babies and toddlers as well and they have pooped the diaper and needed a diaper change.
I've seen a few other toddlers get their poop diaper changed so yes they do poop their diapers in amusement parks and other public places.