Easy step only. If user selected the rating starts just store the no of stars selected into a variable or tinydb or anything else(recoverable part) and then recall this number wherever you want..
Here I have shown you the instant reflection. Rating 2 is automatically selected based in Rating 1.
Store the rating in tinydb, and in screen inti just call set rating to call tinydb value
So once rating selected whenever he open it will pop up.