My fingers are not fully compatible with touch screens so I'm not a big phone guy, so I can't speak for them, but I've been trying to make my computer more task oriented, to make choices more explicit.

I've experimented with using PWAs instead of browser windows, or even having different user accounts for different activities.

It works pretty well in combating the sort of tab cycling zombie mode it's easy to fall into where you aren't really doing anything but checking feeds and notifications. It doesn't block me from doing anything, it just forces me to do one activity at a time, which needs to be chosen upfront.

My inspiration behind this was basically old desktop computers, which with their single CPU core and small screen basically only permitted you to single-task (even if you could technically have multiple windows open you only really worked in the one).