Hello HELPAPPLE999,
Welcome to Apple Support Communities! We understand your notes disappeared from your iPhone but they are still on the iCloud account on the Mac. We're happy to assist you with this.
We see you referenced If you're missing notes on your iPhone, iPad, or iPod touch. Have you tried all of the steps within that article? Also, are you signed in with the same iCloud account as the one on your Mac?
Restart the iPhone to see if the notes reappear: Restart your iPhone - Apple Support
You can also toggle Notes off in Settings > (tap your name) > iCloud > Notes. Next turn it back on to see if your notes reappear.
Best Regards.