Most kids get their diaper changed every 2 to 3 hours even if the diaper is not all the way wet so that is the general guideline to changing kids diapers.
Most incontinent adults or teens would also follow that diaper changing schedule if they are just people who are incontinent and don't love to wear diapers.
But like me and you we love to wear diapers so hate getting out of the wet diaper and you can stay in the same wet diaper safely all day if you desire.
However be aware that if you do sit in the same wet diaper all day that the pee will begin turning to ammonia and could cause a rash if your skin is more sensitive.
If you have a hard time getting diapers then enjoy the same wet diaper as long as you desire for that day but you might want to change the diaper every 3 to 5 hours.
I will sometimes wear the same diaper all day long and then change it the next morning if I don't have to go anywhere.
I also put on a thick ABU diaper and wear the same one for 8 hours at work and then come home and stay in it for the rest of the day and sometimes all night if it's not leaking.
The leaky diaper could leak on your bed so you might not want that and once the diaper begins leaking it would be a good idea to change it to avoid getting urine on your pants or furniture or floors in your house.