SODE offers only the ability to have multiple jetways, but it's then up to the scenery developers to make them and add them in the scenery.
Converting all the existing jetways we had in KIAH to SODE, without making any changes, was the best we could do in the limited time we had, during the KMEM release.
Of course, in time we'll try to revisit all sceneries that might benefit from multiple jetways, and add them.