You can’t view subs of a nsfw instance from a non-nsfw instance https://lemmynsfw.com/post/543

You can create a new user on that instance, then you’ll see the sublemmys and posts

If you’re on Android, Jerboa allows you to control font size and feed type (cards, list…) so you can make it pretty condensed. I use List and font 14, and view about a dozen posts/scroll

The generic one looks like a good starting point, thanks!