Update on this:In the same boat where I put in my Serial Number and IMEI and it says that I’m not enrolled.
Also went to the Citizens One loan page and there doesn’t seem to be any recent payments made (though I have been doing it for the past 11-12 months)
Not sure what to do, but reaching out to support now.
Got transferred to Apple in the Agreements Department and he had me go to checkcoverage.apple.com and give my serial number. Apparently, having AppleCare+ is part of the criteria for determining if you are in the Upgrade Program or not. And for some reason, it completely dropped off my phone and account. The guy filed an escalation ticket and he said check back in a day or two and everything should be all set. Going to cross my fingers.