FC24 on the Switch 2 has no way to turn off voice chat?!

Just got a Switch 2 and tried EA FC 24 on it with a friend online who owns a Switch 1 and plays it on there. For anyone that doesn't know, the Switch 2 has a built in microphone on the console and when I joined their online friendlies room my voice started playing through their TV through the in game voice chat.

I thought it was a bit creepy as I don't recall ever giving the game permission to use a microphone. I've also been looking through the settings and I can't seem to turn it off because obviously the Switch 1 didn't have a built in microphone.

My best guess is that since the Switch 2 has a microphone, it recognises that voice chat could be enabled but since it's a Switch 1 game cartridge, and the Switch 1 didn't have a microphone, they didn't program in any settings to enable/disable voice chat so it's stuck to always being on. This is my best guess as to what's happening but it's very bizarre and pretty weird.