Yes it's OK to wear diapers for 24 hours per day 7 days per week 365 days or so a year if you need too or want too and no matter your age.
Diapers are made for all ages and not just for babies and toddlers.
If you need to wear diapers or want to wear diapers 24 hours per day then that's perfectly fine.
Adult diapers and Youth disposable diapers are sold by the thousands so there's a lot of people using and wearing the diapers.
Babies and toddlers are not the only ones who wear diapers full time.
Whether you like to wear diapers or need to wear diapers as a teen, kid adult etc there's nothing wrong with that.
Now you don't want to wear the same diaper if it's wet or poop filled for 24 hours because you will end up with a rash.
Even a toddler or baby doesn't wear or at least should not be wearing the same diaper for 24 hours.
Babies and toddlers get changed every 2 to 3 hours per day.