Link to - Garmin How-To - Public Beta/Alpha Program

"This software kicks off Garmin's new alpha/beta program for Fenix 6, Enduro, Tactix Delta, and Quatix 6 products"

https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-6-series/293220/beta-version-21-00-and-beta-forum-update

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Are you able to enroll ? Follow this link for FAQ and process to enroll

https://forums.garmin.com/outdoor-recreation/outdoor-recreation/f/fenix-6-series/293167/garmin-how-to---public-beta-alpha-program---fenix-6-and-other-devices