Nintendo has announced they are removing support for Online Lounges for Splatoon 2, the only game that actually supported the feature, and thus basically completly killing all the promises they made when introducing Nintendo Switch online as a paid service back in 2017.
The idea of the online lounges was actually pretty cool. You could create lobbies on games and then on your smartphone get an URL for other players to join that lobby, so you could share it on Discord, or even with followers on Twitter, so they could join your game instantly.
As of now, only one single first-party game supports native online invites, a feature that was introduced in 2019; Super Mario Party. All other Nintendo games lack a way to invite players to a match.