Are MOCA adapter supported between the Xfinity ONT and Xfinity modem

Hello.

In August, I had new fiber service run to the house. The builder had the electricians run coax from the basement to the office assuming that would be needed. The install went fine and the system is working well. The challenge is trying to move the modem from the basement to the main floor. I purchased two ECB7250 MOCA adapters from ScreenBeam. The connectivity that I'm attempting is: Fiber from pole to Xfinity ONT, Ethernet to ECB7250, coax to ECB7250, Ethernet to Xfinity modem. I have a ticket open with them regarding their devices, but can you tell me if this is generally supported by you?