Read deleted Whatsapp message afterwards?

I want to restore a deleted Whatsapp message, just how do I do it? I tried this trick trick 2

https://www.regenbogen.de/ratgeber/technik/20190214/trick-geloeschte-whatsapp-nachrichten-trotzdem-lesen

I can't find the widget (notification settings) on my Huawei P20 after activating developer mode (Android system). Does anyone know where that is?

Or knows another way?

In the meantime, I have 3 different "Notification Log" apps on my cell phone so that this won't happen to me again. Since these do not work properly, I installed 3.

I've never heard of it being possible. If not, you just have to ask the person, often you get what was written out of them. I often do

I've tried it many times, but it doesn't work. Deleted is deleted.

You can download an app that I had earlier and could see the deleted messages from there, but you can't see this message anywhere else you should have downloaded the app in front of it