When the call came from Obi-Wan to the Force users for help, Kylo almost disregarded it, but he was smart enough to know that it wouldn't help him in the long run to not help out when he could, so he had shown up in the Lorn level, hood covering his face so as to not really garner much attention to himself as he used the Force to move the rubble out of the way so it could be disposed of properly.

He was also trying his best to avoid Obi-Wan while he was helping clear rubble out. Kylo had learned from their first conversation that he didn't want much to do with the man and was going out of his way to not be around him unless he actually had to, but avoidance only lasted so long when he was actually not in an area the size of a gigantic turtle and when the opportunity presented itself, Kylo brushed past him when he was sure he wasn't in the middle of moving rubble around.