Stereo in user drum sets?

I noticed there’s no pan control in the drum set maker so I’m guessing the only way to achieve stereo panning in a kit is by recording drum samples in stereo with a higher volume in whichever channel you want to pan towards (i.e. left pan would have higher volume in the left channel)? Seems like this is how some of the default kits achieve a stereo effect if you look at some of the wav files in an editor.

No-one know anything about this?

Not a clue, but good question!