Reading on smartphone affects sigh generation, brain activity, and comprehension
This reply spoke to me. I did it a few years ago and it has helped a lot.
I've silenced my phone 8 or 9 years ago and it's been like that since then. (With unmuting it very occasionally. Like a few times a year, maybe.) The notification frequency must have grown a lot since then.
I have no idea how people can deal with their phone beeping and vibrating constantly. Actually, I get annoyed pretty quickly when e.g. my partner leaves her phone in the room.