If the diaper is not wet or dirty and your 7 year old needs to poop or pee he should be poop or pee the diaper before changing it.
No need to waste a good dry diaper.
I always wet or pooped my diaper when I was wearing diapers for bed wetting at age 7.
I also have a 6 year old brother who is not potty trained so he wears Gentle Steps size 7 diapers all day and all night and he uses his diaper for both poop and pee.
He said he loves wearing his diapers and loves pooping and peeing them.
I also love wearing diapers and love poop and pee diapers as well.
The boy in the bottom picture looks identical to my 6 year old brother and he loves wearing just his diaper like this boy does as well.
A lot of older kids wear diapers and here's a few that loved wearing their diapers just like me and my brother many others.

