Rey had zero idea who Anakin Skywalker was and seeing him in his young form is too out of left field for me, for him to appear I think he would need to show up before that moment for a Rey connection to work.
She says in TLJ that she knew about the redemption of Luke’s father… Also, Anakin literally speaks to her in TROS. There’s several other minor examples of her knowledge of Anakin but these are the main ones.