The official Nintendo Switch Online app has been updated to a new version across all supporting iOS and Android devices. Read on below for the official release notes:
What’s New in Version 2.2.0 (iOS)
・ You can now send friend requests using your friend code. (Accepting a friend request requires a Nintendo Switch console.)
・ You are now able to copy your friend code as a URL and/or save it as a QR code, which others can then use to send you friend requests.
・ Other minor changes have also been implemented.
・ System requirements have been updated to iOS 14.0 or higher.
What’s New in Version 2.2.0 (Android)
・ You can now send friend requests using your friend code. (Accepting a friend request requires a Nintendo Switch console.)
・ You are now able to copy your friend code as a URL and/or save it as a QR code, which others can then use to send you friend requests.de.
・ Other minor changes have also been implemented.
Pokémon Blog 
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