Some toddlers could care less if they have a wet or poopy diaper on and hate having their diapers changed so yes some toddlers are very comfortable wearing wet diapers and would wear the wet diaper all day if their parents let them.
Sadly though parents would not let their child wear a wet diaper all day because they could get a rash which is understandable.
When I was a toddler I remember being 3 years old and would wear a wet diaper all day if my mom let me but she had to chase me around and fight me to change my wet diaper.
Now today as an adult I can act like a toddler when I want too and wear a wet diaper all day if I want too as well.
I wear highly absorbent thick adult disposable diapers that can take several wettings and I can wear the same diaper all day and sometimes all night if it's not leaking.
I also like to sit on the toilet wearing my soaking wet diaper and pee in it and let it leak into the toilet.
Wet diapers are the best and most comfortable underwear.