How to turn this thing off? Xiaomi 6

This means that each software has a different choice. In other words, when this software is notified, you should turn it off or on in that software. You can only allow partial notifications, or system notifications. Of course, you can't intercept every software notification. It's actually quite simple. Just drop down the notification bar and select the notification you don't want. You can set it by sliding to the left, and a gear will appear behind it. I drew you a picture. I don't know if I can understand it, but it's actually very simple. You can operate it. If you don't understand, go online and ask yourself. I gave you a detailed answer. If I think it's ok, give me a recommendation or adoption, and I'll get a higher score. Thanks for your support. For your answer, I have given you pictures very seriously. Thank you.