I basically can't find stories that hit the way I want. There have been some but for me diapers were always, and will always be, a sexual obsession with not much relation to caregivers or regression. Being forced into diapers, humiliated, regressed, babied, sissified, etc... does nothing for me. What I want is stories about kids who finally act on their obsession with diapers during puberty when they can't help but cave to the desire for sexual exploration.
So the themes I like to see: sexual awakenings involving diapers (like I experienced IRL), mutual interest between friends, parents being supportive or at least understanding if/when they catch their kid in a diaper, babysitters/older friends or siblings enabling exploration by helping the protag get diapers or teaching them stuff about their body that they feel they can't ask a parent about, and also homoreroticism (for girls too!). I grew up in a mildly gender segregated middle of the road religious community. Girls and boys were never forbidden from being around each other, it was just implicit in the kinds of activities and social events that parents would run or host, that boys and girls split up to do different things. So to me the idea of pubescent kids experimenting with diapers in heterosexual situations just doesn't fly if their isn't a power dynamic at play, like an older female babysitter letting a boy try on diapers. There is something so much more compelling to me about same-sex exploration than hetero among peers. Like kids at sleepovers where parents assume nothing weird could happen, turn into a fun scenario when the non-bedwetting kid takes the chance to ask the bedwetting kid if they could try a diaper and things go from there.
I'd love to see more adult protags that discover diapers later in life. In particular I've been looking (and finding nothing) for any story about a single mom who is super stressed and has no sex life rediscovering her sex drive when she starts wearing her child's Goodnites or something like that. Bonus points if the mom only learns about ABDL and tries it herself after catching her kid wearing diapers.