https://techcrunch.com/2021/03/08/apple-security-updates-iphone-ipad-mac-watch/

Apple has released a set of security updates for iPhones, iPads, Macs and Watches. There are no new features — but these are updates you will still want to install.

As part of these security fixes, iPhones and iPads will update to iOS and iPadOS 14.4.1, watchOS users will update to 7.3.2 and macOS Big Sur will update to 11.2.3. Those on older versions of macOS can install the latest version of Safari, bumping the version to 14.0.3.