Currently, Cisco Meraki supports WPA3-Personal and WPA3-Enterprise modes, but there are some limitations and considerations when using these modes, especially with the 6 GHz band and 802.1X authentication.
WPA3 Encryption and Configuration Guide - Cisco Meraki Documentation
But to be honest, only Meraki will be able to answer whether there is any provision for dealing with these limitations.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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