That’s because when you have four runways, having suffixes (L, C, R) isn’t always ideal.
The CDG example isn’t far off what you’d expect - the runways are all parallel between 080-090 (and of course 260-270 in the other direction). Having the two separate numbers differentiates the two pairs of runways quite nicely.
I’m not sure how much of this will end up in the game - particularly since the early releases will only have 90 degree rotation, so all runways will be either 18/36 or 09/27.