Read, knitting/crochet, sleep, listen to music, play games (eg. emulator + pokemon games), study, read a newspaper, do crosswords, play chess online, watch a movie, listen to a podcast, learn a language, talk to other non-scrolling people, and yes, you can also stare outside, daydream or self-analyze, or even do nothing. Just a few decades ago we had a lot of dead times, it's not that crazy to pass an hour without having anything to do.
A lot of those suggestions mean staring at a phone or smilar device and a bystander like ggp might not be able to tell them apart from looking at social media.
Comments like this always ignore the fact that in the olden days before phones, a majority of people read newspapers or books and busybody news columnists bemoaned how everyone was lost in their media instead of socializing.
Literally nothing has changed in the past century other than the variety of idle tasks one can keep in their pocket. People chose to not engage then exactly the same as they do now.
