iPhone 17 remains Carrier Locked after 60+ days of service on Xfinity Mobile

My paid off iPhone 17 remains "Carrier Locked." This device was supposed to be locked to Xfinity Mobile for 60 days since I fully paid for it at purchase. It's been continuously activated with Xfinity for 100+ days. I've verified this by attempting to load an additional eSIM on the device, and it blocked it.

I've contacted Xfinity chat 3 times and visited the Xfinity store and have not received a resolution. Additionally, an Apple store genius told me it was a carrier issue.

Personally, I suspect the issue has to do with IMEI vs IMEI2. The Xfinity Mobile website shows my device's IMEI, but the original eSIM had loaded to the iPhone's IMEI2 slot. Recently, I factory reset the device and loaded a new XM eSIM, and it registered to the IMEI.