When it's 3 or more males, the [mmf threesome] tag is usually combined with [group] tag to signify a female getting gangbanged. That is the current workaround.

I think it's a flaw of the tag name. Limiting it to just threesomes isn't terribly useful as this type of content tends to involve more than two guys.

I agree, but as someone said "multiple males" is more accurate

I would say "multiple males", not limited to two with this tag

There could be a difference between mmf e mfm threesome, cuz the males usually don't do each other in mmf should be mfm, same with ffm e fmf