Well, actually, PieFed.social has enabled it’s API which means that the Android app Interstellar can be used with it. Find out more about the app at https://interstellar.jwr.one/.
Later today https://feddit.online, another PF instance, will enable the API too and I expect others will follow in good time.
Yeah sorry, I’m guessing Flutter (Interstellar’s UI framework) doesn’t support devices that old.