Turn off all notifications except messaging and see how your day goes. It's not going to kill you. You quickly get used to regularly checking things you actually care about, and the rest has to wait until YOU care.

I've been doing this for many years, and none of my friends or colleagues are aware of it, and they don't need to be. Notifications don't help you respond quickly, they just grab your attention from things YOU wanted to do.

I haven't checked Discord today yet. I haven't checked my email. Whenever I do want to know if my friends wrote me, or if I have some new bills, or if I need to follow up on something, I will open the respective app and deal with it.

I can put my phone next to me for hours and not get distracted.