Nintendo's Switch online mobile app is a thing. It can be used to do this and that in games like Super Smash Bros. Ultimate and in more recent times NookLink - a companion app for Animal Crossing: New Horizons - got added to it, allowing players to scan QR codes and communicate with friends in-game.
If you still happen to be making use of the NSO application, you might be interested in updating it. According to Perfectly-Nintendo, Nintendo has just updated it to Version 1.7.0. Here are the patch notes:
Various issues are now resolved.
While we can't say what changes have actually been made, we do know the download is around 50 MB. Do you still have this application installed or have you completely forgotten about it? Leave a comment down below.