The new update has arrived.
If you're still making use of Switch Online mobile app, and happen to be using an older device, you might want to read on.
As highlighted by My Nintendo News, Nintendo's latest version of the app (Version 2.9.0) will no longer support iPhone users running on anything below iOS 15. The latest version of the Switch Online app also requires Android users to be running on "Android 8.0 or later". Here's the official update from Nintendo about this:
Read the full article on nintendolife.com