Mesh WiFi equipment is great for getting WiFi around a home.
However, if you rely on WiFi for the transmission between each WiFi node (backhaul) this affects the WiFi nodes bandwidth.
Roon transmits a continuous stream. The more WiFi hops it has to take and the more WiFi devices on each WiFi node will give some Roon users a few issues.
Apps like Sonos and Tidal most likely buffer and are less susceptible to drop outs.
I had the 1st gen Google mesh WiFi system with 3 nodes.
I connected the primary node to my ISP supplied router (which I put in modem mode) and this first node is the DHCP server.
I connected it’s LAN port to a network switch. I then connected the other 2 nodes via ethernet to the switch. This places the backhaul over ethernet freeing up the WiFi bandwidth.
If your ISP supplied box doesn’t have a modem mode, the Google mesh devices usually go into a bridged or access point mode. In the Google Home app, if you select the WiFi nodes, in their settings you’ll find this out. If they are connected to another router which is the primary DHCP server, the Google WiFi nodes allow you to change their mode.
If the ISP Router doesn’t have a modem mode, you can connect it via a LAN port to a switch and then connect all your Google WiFi nodes to the switch. Again giving a wired backhaul.