When Kylo was on Mustafar and he has killed everyone, he turns around sharply as if he has heard something call to him. I know you’ve added sounds to when he picks up the wayfinder but would it possible for the sounds be extended and for them to start just before he quickly turns.
That reminds me - since we have different visions for Rey and Kylo, did we end up removing that one shot of Kylo twitching on Mustafar? I feel like that might be able to be repurposed for this idea here.