I recently heard a presentation by a Protestant missionary who served in a remote jungle (to give you perspective, the village is a 30 day walk from the closest road). Since there are no grapes or wheat (the villagers have never had bread of any form), for Communion, they used water for the cup and everything from sweat potatoes to bananas and gourds in place of bread
I don’t want to get into a discussion of Protestant Communion being invalid, etc., etc. I simply want to know what would happen if a Catholic missionary went into a jungle and there were no grapes or wheat. Would the new converts never receive Communion?