It looks like Gizmo is not yet compiled for the ARM architecture of the latest macintoshs.
dlerror:dlopen(/Users/Shared/X-Plane 12/Resources/plugins/Gizmo64.plugin/mac_x64/Gizmo64.plugin.xpl, 0x0006): tried: '/Users/Shared/X-Plane 12/Resources/plugins/Gizmo64.plugin/mac_x64/Gizmo64.plugin.xpl' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64')), '/System/Volumes/Preboot/Cryptexes/OS/Users/Shared/X-Plane 12/Resources/plugins/Gizmo64.plugin/mac_x64/Gizmo64.plugin.xpl' (no such file), '/Users/Shared/X-Plane 12/Resources/plugins/Gizmo64.plugin/mac_x64/Gizmo64.plugin.xpl' (mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64'))
You might need to run x-plane in rosetta mode.