AutoNotification has been, to date, able to block/hide ANY notification reliably, even in the free version. Which reminds me, such a good app needs support so I'll get the full version now.
I block things like "App xy can view an control youe screen" (No shit, nova launcher needs to do that?) and messages by apps that let them run in the background, eg. Element.
Only seems to work for me about 5 minutes at a time. No battery optimization, allowed In the background etc. Still Android insists on reminding me that my battery is charged, and other totally uninteresting battery-related info.