Like I said, I just found two age transformations in the manga Judas. They're a bit creepy, and the AR is infiuriatingly short, but since it is content, I figured I'd mention anyway.
At one point in volume two, two villains with the power to control time use them for the evulz on two girls; one girl is aged to dust, while the other is transformed into a newborn.
But like I said, while the AP is shown in full detail, the AR is, OF COURSE, glimpsed over. The poor APed girl is shown withering into a crone, then a skeleton, and then dust, but the AR cuts away as we hear the other girl scream, then a tiny panel is shown with her newborn hand and part of her clothes on the floor. Since the AP is creepy and the AR so short, I honestly don't know whether I should bother mentioning it, but whatever, these still are AR and AP.
(Yeah, you can tell I'm salty; I expected much more, but as with almost every single time I found AR content lately, the content itself is severely disappointing)
The start of the transformations is here:
https://archive.org/stream/manga_Jud.../n157/mode/2up