Yeah, this is definitely ‘Rey Palpatine, but better - with Nobody parents’.
In fact, I think this can be simplified further, with her parents not needing to be Sith cultists:
“Rey… wherever you are… you are hard to find.”
“You are hard to get rid of.”
“I pushed you in the desert because I needed to see it… I needed you to see it… who you are. I know the darkness that lives in you, Rey…”
“You’re lying.”
“You were right… your parents were no one. Junkers, kidnapped by the Sith to serve the cult on Exegol.”
“Don’t!”
“They were forced to raise you, alongside other dark… experiments.”
“I don’t want this!”
“But they grew to love you nonetheless.”
“No!”
“They stole you away from him. From Palpatine.”
…etc
“Why did the Emperor come for me? Why did he want to kill a child? Tell me.”
“The Sith cult made many attempts to create a stable host for his fading spirit. Rey, you’re a clone of the Emperor. You… are a Palpatine.”
“But his essence chose another body, making the rest of you… rivals. But what Palpatine doesn’t know is that we’ve become a Dyad in the Force, Rey… two, linked by pure power. With that power we can end him and the Sith, and create something better, together…”
(Removes his helmet)
“You know what you need to do. You know?”
“I do.”