Put the phones away and find activities which you both enjoy?
It's been years of arguments that end with "we'll find something to do together".
Our media consumption habits probably aren't the core problem, being able to easily ignore the other person; because the barrier to entry to time wasters is so low, certainly doesn't help.
This is the main problem in my marriage, we don't consume the same media - we've tried to find something in common to watch, but mostly spend it on our phones watching our own media streams, edu-tainment YouTubers for me and Netflix/Disney/Facebook watch for her.
You can't make cultural references or have inside jokes if you don't consume the same media.