Splatoon 2 Online Lounge Discontinuation
Players have been able to use the Online Lounge feature of the Nintendo Switch Online app to arrange Splatoon 2 online battles using their smart device, such as by sending a link that allows social network friends to join a room.
As of 29 July 2021, the Nintendo Switch Online app will no longer support the Online Lounge feature. However, the app will continue to allow friends to voice chat, and no other changes will be made to the app at this time.
You can also continue to start a local or online multiplayer game in Splatoon 2 without using the Online Lounge feature.