Here’s what I could gather:
Dean Ambrose was backstage at last night’s WWE Survivor Series PPV but was never scheduled to be involved in any matches or segments. He was most likely there because he travels with his wife, Renee Young.
Elias was backstage at the PPV despite not being used as was Ember Moon.
Finally, Becky Lynch was also backstage at Survivor Series due to the fact that she was set to undergo medical testing as she recovers from a concussion.
Everyone else – on both Raw and Smackdown rosters – were given the night off.
Already noted this earlier, but a source reached out to indicate that there were a ton of FOX network executives backstage at Survivor Series. Their presence makes it a curious decision on WWE’s part to have Raw completely demolish Smackdown at the PPV.