Single entity in entity parameters is not supported

I updated MCreator to 2022.2 to use the new command parameter builders, and I wanted to make a command that accepts a single entity in an entity parameter. MCreator supports single players (EntityArgument.player()), multiple players (EntityArgument.players()) and multiple entities (EntityArgument.entities()). However, when I checked Minecraft's code, I found there is support for single entities (EntityArgument.entity()), which is not supported in MCreator. Is this a bug?