https://arstechnica.com/gadgets/2023/10/apple-releases-ios-16-7-2-and-ios-15-8-security-updates-to-patch-old-hardware/

Apple is releasing a slew of updates for its latest operating systems today, including iOS and iPadOS 17.1, macOS Sonoma 14.1, watchOS 10.1, and others. The company is also releasing security updates for a few previous-generation operating systems, so that people who aren't ready to upgrade (and older devices that can't upgrade) will still be protected from new exploits.

Those updates include iOS and iPadOS 16.7.2 and 15.8, macOS Ventura 13.6.1, macOS Monterey 12.7.1, and the Safari 17.1 update for both of those macOS versions. At least for now, the iOS and iPadOS 16 updates cover older iPhones and iPads that can't run iOS 17 and newer devices whose owners simply don't want to install iOS 17 yet. Apple will eventually stop supporting newer hardware with iOS 16 security updates, but for now the grace period is still in effect.