While there hasn’t been any discernible movement lately with respect to jailbreaking iOS & iPadOS 15, the good news is that a lot of different potential exploits now exist in the wild, putting the ball instead in jailbreak developers’ courts. In fact, it seems that another could be on the brink of development at the time of this writing.
Hacker Justin Sherman shows off exploit that works on iOS 15.2, albeit with a poor success rate