along with the strong censoring that has occurred on reddit throughout the years, they have now removed r/all from the app and while using a desktop/laptop browser. instead of being able to stumble upon new subreddits you never knew existed, it wants to curate what you’re allowed to see
When I go to old.reddit.com, I get Popular in United States and All states. But you can change the drop-down to “Everywhere.” I suppose that’s as close as we can get to r/all now.
https://old.reddit.com/r/popular/?geo_filter=GLOBAL
I have no idea how this works on the phone app, I don’t use it.