1.20.2 biome dependent villager trading unintuitive for new players

Currently there is no indication of the existence of swamp/jungle villager in the game, without the help of an external source (that be more experienced player or online websites). Because villages don't generate in those biomes and only specific biomes have different villager types, not every single one, new players who don't know about that feature wouldn't be able to trade for those biome specific trades (from librarian villagers)