Yes, there is a message when launching a new game saying that rich rocks resource will not spawn in the game (cause not configured in RSO).
It is also clearly stated on the mod page that it is currently not compatible with RSO.
Rich rocks is a new ore (patch) resource. It is a late game resource (only exploitable after yellow tech), that once processed, can give you a bunch of pretty much all other ores/resources available in a given playthrough. So it is not part of the starting area.
At this point I don't know if there is work to be done only on your mod or on both...
Thanks a lot