Recently, if your friend told you that he did not see the notification of the message, don’t think he was just looking for any reason to prevaricate you, because in iOS 14, many users reported that they were unable to receive the notification of the new message. It is judged that this is probably caused by a bug in iOS 14.
The reason why it is considered to be a problem with iOS 14 is that some of the affected users are old iPhone users, which means that they did not encounter related problems before upgrading to iOS 14.
And some corrections have begun to appear on the Internet, but they only treat the symptoms and not the root cause, so we can only expect Apple to fix this problem in the next version of iOS. The latest version of iOS 14.3 should be launched tomorrow, and we will soon know whether it will be revised.