Twitter and Reddit
Similarly than YouTube, you have self-hosted app to browse the content from Twitter and Reddit in a more private way. Nitter (for Twitter) and Teddit (for Reddit) are good example. You could also host your own instance by yourseft if you run a server or have a VPS with free resources.
Many open source apps allow to browse Twitter from Android (Twidere, Fritter, Shitter, …), same for Reddit (RedReader, Infinity, Slide,…) search on F-Droid there are many.
Reddit, as a platform for sharing interesting links and topics, has a lot of alternatives with various communities. For example Lemmy (several public instances to choose) or SaidIt which is a clone of the old user interface of Reddit with its own communities. You even have specific topic Reddit-style website like Stacker News for Bitcoin or Hacker News for “Anything that good hackers would find interesting”. If you search you might find many more and maybe one that fit your specific interests and hobbies.
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