Xfinity Xb8 and slow wired network

Im on my third XB8 and I am on the 2Gb internet plan. I dont use the XB8 for wireless at all. I test the gateway from App and get 2GB. I wire into XB8 and i get 100Mb from any PC i use. I have used Cat5e, 6, 6E, 7, 8 plug into any port. Same issue.

I have tried from a Win10, 11, Mac OS and Linux.