hi @sammeader below document describes the Firmware Release process:
https://documentation.meraki.com/General_Administration/Firmware_Upgrades/Meraki_Firmware_Release_Pr...
There doesn't appear to be a process to be notified in advance of a Firmware version coming out of Beta into a Stable Release Candidate. The process notifies you 7-14 days ahead of your Network devices being upgraded.
Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.