Aside from lemmy...
Twitter with Squabler which is nice not getting any ads and accounts I follow through the app shown in chronological order. No ads.
Reddit with Stealth which is another nice app not needing an account to subscribe to subreddits and save comments or posts. No ads.
YouTube with newpipe and freetube which is another nice app that let's me subscribe, skip sponsors, no ads, and no need for an account.
Still working. Not sure if it's abandoned but gitlab last activity for Stealth seems to be 6 months ago.