Apple released iOS 15.7.5, iPadOS 15.7.5, macOS Big Sur 11.7.6, and Monterey 12.6.5 bringing important security fixes to older iPhones, iPads, and Macs.
Nothing new about this. Apple said over a year ago, that the iPhone 6s and 6s Plus would continue to get security updates for a 2 more years. This writer doesn't seen to know much.