I looked at the Ben death scene and unfortunately there is no shot of Rey right after he vanished completely, only while he’s lying there. I guess they could be rearranged, but otherwise a new line wouldn’t be able to fit there sadly.
EDIT: There IS a smiling reaction of Maz after him and Leia vanish, and she is Force-sensitive enough to hear those voices, but it would create the impression that Ben is talking to Maz which is weird since they have no previous connection.