Like others have said I do wonder if companies are aware of needs or have a target range, but also want parents to know they offer products for older kids. Being IC and paralyzed I do often meet and talk with others with disabilities and often especially with special needs parents even though they are very smart and educated many don't know various ic products available. So like last year I was cleaning out some older products I finally came to terms likely hood of me fitting into them again is probably not going to happen (we all know diapers are expensive so I had few cases of Abena, Molicare few others in Medium) but remember one of the times I ordered Med Tranquility ATN they sent me smalls I know someone with a special needs teen and asked if they had need or knew of someone. They did express how unhappy they were state provided ones. I did go extra mile(sometimes like to do good things or pass it forward) so I not only had the case of ATN's but also picked up a pack of NS, Abena, and NS Boosters. When I met with the mother I explained what they were & mentioned I get with disabilities things get expensive the NS/Abena maybe good options for special use but the boosters are great affordable option to extend use of what they currently get provided. They were super appreciative they heard of the ATN's but didn't know about others and have told them about other brands as well one thing she mentioned was this topic isn't something many don't talk about even medical providers which I understand that frustration and why I like to advocate or provide advice because I wouldn't want someone in similar situation have to go through what I did.
That family I donated diapers to have since started getting better ones for special use and earlier this year they were so happy because they were able to go to a family party without issues.
So from experience I don't think it's totally new problem, I do think there maybe more kids/people diagnosed under special needs umbrella because access to care has gotten better, I think parents more aware of disabilities, and think there is more support. Even go back say 10yrs sometimes if the docs didn't know some kids were misdiagnosised as add/ADHD and might of been ASD or something else. But even with diagnosis I do think incontinence in older kids was also misunderstood like it being a legit medical issue vs psych issue also in the world of acceptance it does feel like or seem with as many products geared towards say bed wetting even that's accepted where even though I don't have best memory when I was a kid many were shamed and punished or it wasn't understood most kids weren't doing it on purpose. Also as I mentioned I do think companies are realizing many people don't know there are other options so they increase marketing