Excuse me, but that’s like saying “my sex is 20x10x10x10”. The combinations are still in the thousands even if you use different notation. It’s like representing male/female as 0/1 and saying it only uses one bit, but everyone still hast to remember the name and expectations associated with that bit.

A sentient species with so many sex combinations would not bother to name each one, or attach specific sociocultural traits to all of them. Humans, for example, know like 10-20k words, passing sex ed would be like reaching master level in a foreign language. It would be a tag with less meaning, like age, height, or blood type are.