Meraki does not yet support the new account-driven enrollment flow introduced by Apple for iOS 18.
Meraki still supports other enrollment methods like Automated Device Enrollment and standard device enrollment for organization-owned devices.
Apple Automated Device Enrollment (ADE) - Cisco Meraki Documentation
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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