I get like a few notifications a day, mostly just ntfy notification from all my autotion script telling me was something successfull or watchtower thelling me what docker container was update so that I know that it is cause of the update that something started behaving wrongly.

Everything else I ignore with passion, even have notification sound's and vibration turned off for specific app's so I don't get sound or vibration even if my phone is on full blast. Help's a lot.

You just do. I read the pop-up, if it’s important I open the app if not I do nothing and the notification just sits there. Also end of the day I just scroll trough my email inbox and see if there is anything important. If not I do nothing. And then once in a while I just purge certain emails based on the address. Inbox zero is just a waste of mental effort to me.