Hey duckman1042,
Thank you for using Apple Support Communities!
The steps below can resolve the issue. If you haven't already, you might them:
Update macOS on Mac - Apple Support
(macOS 12.2.1 is the current macOS version as of our reply.)
Create a note in Notes using the iCloud website to see if the new note delays in syncing to your iPhone. Creating a note here creates it directly at the source, and it will be a good determination of whether the syncing issue is with your Mac or iPhone.
Use Notes on iCloud.com - Apple Support
If the new iCloud note doesn't immediately sync to your iPhone, you've successfully narrowed it down to your iPhone connection. Try standard troubleshooting, testing a new note in between, to see if it helps.
- Restart your iPhone
- Test with another network (Wi-Fi, cellular, etc.)
- Toggle Notes off at Settings > [your name] > iCloud Notes for a few minutes
These are helpful articles when using iCloud Notes:
Set up iCloud for Notes on all your devices - Apple Support
Keep your notes up to date and share them with iCloud - Apple Support
Cheers!