No. Obviously no. I'll pile on and agree with the many that stated that as the OP's question was originally stated, that would be child abuse. All of the other scenarios whereby you might ALLOW your child to wear diapers longer, like bedwetting, are just that "scenarios"... They have nothing to do with the question asked. Of course, if your child wets the bed, diapers and/or pullups must be considered. Of course, if your child has recurring "accidents", then diapers and/or pullups must be considered. Of course, if your child has problems potty training, then diapers and/or pullups must be considered. If your child just doesn't want to potty train, that's tough. It's not their decision to make. It's the parents' decision. Pre-adolescent children don't GET to make adult decisions that can impact the rest of their lives. If, after they are potty-trained, they decide at some point that they just "like" being diapered, and want to start wearing diapers AGAIN, then that's a whole other conversation. Preferably one to be had with a family therapist, counselor or Child Psychologist.
What any responsible parent DOESN'T do is "make" their child wear diapers longer than is necessary, for any reason.
"Makes" implies that child either no longer needs them, or doesn't want to wear them, or both. That's called "Diaper Punishment" or "Diaper Discipline", and while it's an accepted fantasy scenario, anybody advocating using it on an actual child, is just asking for permission to psychologically abuse and stigmatize an innocent, no matter their intent.