1 Gig plan showing 100 Mbps upload instead of 1 Gbps

I upgraded to the 1 Gig plan specifically for symmetrical 1 Gbps download/upload service and received an XB10 gateway. If I go to "Manage Plan" -> "View & Manage Current Services" (which takes me to https://www.xfinity.com/learn/existing/offers-changeplan), my account currently shows:

Upload speeds: up to 100 Mbps

My actual upload speed is ~125 Mbps, which is consistent with what's currently shown on my account.

Phone support spent over an hour troubleshooting and is now recommending a technician. I believe this is an account/order provisioning issue rather than a physical line issue. Can Xfinity Support please review the order and correct my account to the 1 Gbps symmetrical tier?

Let me know if you need any additional information. Thanks!