Android Security
Google has released the June 2021 Android Security Bulletin, giving carriers and device makers a fresh set of patches to install. Though Google puts out the Android security patches each month, the job of actually getting the fixes to end users falls on the telcos and/or device manufacturers themselves. Those partners vary in their ability to release the patches in a timely fashion.
iOS 14.5
Apple has officially released OS 14.5, bringing the ability to unlock iPhone with Apple Watch while wearing a face mask, more diverse Siri voices, new privacy controls, skin tone options to better represent couples in emoji, and much more.