I swear, it seems like part of Microsoft's overall gaming goals right now is to give the Switch a better experiences. Not only are they involved with games coming to Switch, they're also tied in with a service called PlayFab Party. The offering was showcased at GDC 2019 last week, and it offers all sorts of features for online play.
PlayFab Party is a set of cross-platform libraries and services for easily adding multiplayer real-time networking and chat communication to your game. Party joins PlayFab Multiplayer Servers, Matchmaking, and Leaderboards as services built to enable dynamic and inclusive community experiences.
Microsoft is going to offer a Switch SDK for PlayFab Party, so devs will be able to utilize all the features the service provides. There's really a lot more going on here than just voice chat and text-to-voice/voice-to-text. You can get a full rundown of the service right here.