Hi jenah12,
Thanks for posting in Apple Support Communities.
With iCloud not syncing, make sure that you have available storage to allow the sync to complete. Also, check that you're signed in with the correct Apple ID in System Settings.
1. On your Mac, do one of the following:
* macOS Ventura: Choose Apple menu
> System Settings, click [your name] at the top of the sidebar, then click iCloud on the right.
* macOS 12 or earlier: Choose Apple menu
> System Preferences, click Apple ID, then click iCloud.
4. The storage bar shows your overall storage usage.
5. Click Manage for more details.
6. A list of apps and features is shown, as well as how much iCloud storage they use. The apps and features that use the most storage are at the top of the list. You can click an app or feature for more information.
Check your iCloud storage on any device - Apple Support
Regards.