"Notifications are like alarms other people set for you"
Naval Ravikant said this years ago and it stuck with me. Taking a page from your book, I have 0 notifications. I practice notification 0 and have done it for about a half decade now, and it's absolutely liberating and freeing. I found I needed to remove the apps from my phone Home Screen to feel this, as otherwise even their icon presence when opening my phone triggers dopamine loops.
When I need to be pinged, I use boundaries and expectations set with those who could interrupt what I'm doing with something important enough. Those people get to know where I'm at, how to reach me, etc and mostly what I do to help them is set them as contacts so my phone lets their calls through beyond voicemail, and I have physical locations accessible to them + times through the day where I'll check in.