Yup, you can only use local multiplayer functions in-game but it’s being emulated over the internet with “Citra rooms”. See bottom right corner in Citra to learn how to access the public room browser (or in the multiplayer menu at the top).
Citra cannot connect to Nintendo’s servers so you won’t have access to like For Glory mode.
This is an English only forum, please do not post in any other language. If you are not a native English speaker and are using a translator to assist, you may write your post in your own language as long as you provide the text of the automatic translation in the post.
As a side-note, I don’t think responding to 2 year old comments on a 3 year old topic will get many people to play with you.