Apple has released updates for all operating systems, which essentially bring minor bug fixes but security updates. So you should update all the devices you have.
Improved systems include macOS 12.5, macOS 11.6.8 macOS 10.15 Security Update 2022-005, iOS 15.6, iPadOS 15.6, and watchOS 8.7 and tvOS 15.6. The HomePod can also be updated.
A comprehensive overview of the patched vulnerabilities can be found here.
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