Question: fish you can keep in a 2 gallon tank?
Answer: Dwarf cory catfish, Sparkling gouramis, most any of the smaller killifish, small tetras, Least killiefish ( which is actually a livebearer) all make good bets for a micro community tank. Toss out any “rules” you know about inches per gallon and just keep the tank to about 5-6 fish.