Like lucius says about adding friction: there’s an app called One Sec that simply puts a couple seconds between you and an app (like Instagram). It’s supposed to make it annoying for you each time you open the app so over time your mind desires to open it less and less. It prompts you to breathe during those seconds too, to get you to be mindful instead of impulsive with your phone use. I’ve been using it with Instagram and it has worked to stave off my phone addiction, at least on the front of removing the mindless impulse to doomscroll.