Just make sure they are MoCA2.0 Bonded adapters. Otherwise, you might be limited to ~150Mbps backhaul.

something like this motorola/zoom or this actiontec

There was a link I posted before of someone with almost the same issue. They used different moca adapter and the setup worked.

https://www.reddit.com/r/Fios/comments/fnxn2g/finally_got_300mbps_over_coaxial_with_200200_plan/

https://www.amazon.com/Actiontec-Bonded-Ethernet-Adapter-ECB6200K02/dp/B013J7O3X0