The commonality between FB, IG, Tiktok, Snapchat, Twitter (and YouTube to some extent) is that they're primarily personalized algorithmically generated infinite feeds of stories. The particular algorithms and their objective functions differ from app to app but the underlying model is just the same. These sites generally do have other ways of consuming information, but the dominant mechanism is the algorithmically generated personalized feed.

There are alternatives, such as sites like HN (single feed for everyone), Reddit (per-subreddit ranking which is global rather than algorithmically targeted), many news sites (organized by department vs infinite scroll, newsletters (here's today's set of stories for everyone), etc.