double nat on console home internet

Not sure which xbox version you have, but on Xbox One X that I own, I go into the network settings and click test NAT. Repeat the process until it detects things correctly. I did not try party chat with mine, but I did hear others in game lobbies.

Double NAT usually means you have a router connected to another router, and they are not forwarding ports. So, in your case, you are connected directly to a single router, so you are not double natted. You're just single natted, which can still cause issues.