Apple phones sometimes have them. What is the reason why there is no red notice ring? I didn't find any new information.

Shut down and restart. The apple I use is not as frivolous as you said. Generally, only when there is information will there be a red dot prompt. You can also check the settings to see if anything is turned off. I still think we should close it again and open it later. You can try it, because the MAC works well.