I just bought a Nintendo Switch and was trying to play cross platform with my buddies on PC. The non-java version of Minecraft. So I set up a minecraft server running bedrock and did a tcpdump on my router to where my Switch was trying to connect to. It attempts to connect to mco.lbsg.net. So I pointed that DNS entry on my dnsmasq server to my bedrock server public address and my switch now lets me connect to it and I can play on that server.
Hopefully this gets fixed at some point or let’s us Switch players connect to bedrock servers directly.