How to apply for permission to read notification messages?

You mean the cell phone, right? In Settings, open Application Management, find the software, and click Enter Open Permission. There are rich settings, security, application permissions, and re-opening permissions. Every mobile phone is different. You have to find it, but it's all in the settings. Personal advice, if it helps you, please remember to adopt it. I need your little encouragement. Thank you. I wish you a happy life.