Garmin has posted software version 22.21 Beta for non-Pro Fenix 8 branch devices, including Quatix 8, Enduro 3, and Fenix E. This check-for-updates-only update adds silent mode, messaging improvements, and a broad set of bug fixes.
Garmin has posted software version 21.39 across the Fenix 8 branch. This page explains the stable references, the OTA beta context, the 21.39 beta change log, and why availability can differ by device and channel.