lemmynsfw.com will definitely show communities if not logged in, and you can see everything if you open one. pornlemmy.com shows everything if not logged in. Both of these are from a web browser, and in my experience if I click on a communty from my feed in either connect or liftoff. and if you hit settings and on each instance, by default they are set to filter stuff for not logged in, you can turn that off, even if you’re not logged in.