Apple Reminders App Syncing Issue - iPhone - iOS 16.1.2

I’m using my iPhone 13 Pro Max, iPad Pro and Macbook Pro running the most current operating systems as of 12-5-2022. All signed into my one and only Apple ID. All Apple apps except Reminders sync both ways on all three of my devices. All syncing for all the apps work both directions on the MacBook and iPad. My iPhone receives all changes made on the other two devices. If I make any change in Reminders on my iPhone they do not seem to get pushed to iCloud therefore they don’t show on my other devices. 

I’ve restarted all devices

I’ve turned off and on Reminders syncing

I uninstalled, then restarted, then reinstalled Reminders. 

I’ve signed out of my Apple ID, restarted, signed back in

Made sure the time settings were correct and on automatic

I reset the network settings

Finally, I did a full reset and restore on my iPhone. 

No luck. 

Apple Reminders on my iPhone will not send information up to iCloud. My other devices work great. I’m at a complete loss. I rely on Apple Reminders and the syncing functionality, I don’t know what to do now. Very frustrating.

Any help would be appreciated. Thank you.