Does Xfinity Gateway act as an unmanaged switch even in bridge mode?

I have an Xfinity Gateway that I have put in bridge mode and I have connected one of my mesh routers to one of the LAN ports to create my home network. Now, I'd like to create a wired backhaul for the other endpoints in my mesh network by connecting the WAN ports of the other endpoints to the other LAN ports of the Gateway like I would do with an unmanaged switch. Will this work? Does the Gateway act as a switch when it is in bridge mode and the main router of the mesh network is connected to one of the LAN ports of the Gateway?