Reportedly, Apple will unveil major updates for all its operating systems at WWDC 2022 in June. Also, the company could even tease rOS, the OS for its mixed reality headset. Unfortunately, neither rOS nor the headset will be ready in time for WWDC 2022, though.
https://www.notebookcheck.net/WWDC-2022-Apple-analyst-predicts-innovations-for-iOS-16-iPadOS-16-and-watchOS-9-plus-an-rOS-sneak-peek-for-upcoming-mixed-reality-headset.613308.0.html