I found that the iCloud sync for the Clock app is turned on:
but on my MacBook, the Clock app doesn't appear in the iCloud settings.
Additionally, the settings for world clocks on my iPhone:
These clocks don't show up in the Clock app on macOS:
MacBook Pro 14″, macOS 15.0
The World Clock settings on macOS do not sync via iCloud because macOS lacks a dedicated Clock app, unlike iOS. Although iCloud sync is enabled for the Clock app on iOS, world clock configurations don’t carry over to macOS due to app limitations.
For synchronized world clock functionality, consider using third-party apps that support cloud syncing across devices.
The World Clock settings on macOS do not sync via iCloud because macOS lacks a dedicated Clock app, unlike iOS. Although iCloud sync is enabled for the Clock app on iOS, world clock configurations don’t carry over to macOS due to app limitations.
For synchronized world clock functionality, consider using third-party apps that support cloud syncing across devices.
The world clock does have Limitations as previously mentioned
But, caveat
The Fly Out from clicking the Date / Time in macOS 15.0.1 Sequoia
Top Right of screen
Does Sync between macOS 15.01 Sequoia and iOS 18.01
Refer to image below
iPhone 15 Pro iOS 18.0.1
macOS 15.01 Sequoia
Why world clock settings doesn't sync to my macOS via iCloud service?
