If Fergie is angling for some kind of deal or settlement from the King, she can go jump a fence. The Royal Family owes her nothing. Charles may want to think carefully if he even would consider giving any help to Fergie. Once he gives her any aid, particularly financial, she blow through and keep coming back for more. In addition, if and when the Epstein files are released, there could be plenty more info on not only Fergie, but Andrew. I think Charles would be roundly criticized if he would cut a deal with Fergie.
Fergie has never grown, she was a Daddy's girl and Daddy always helped her out of her scrapes growing up until she married Andrew, then it Andrew and the Queen. She thinks smart and intelligent, she hasn't shown it. This could be difficult for her, her girls and sister may have to help her. I don't see any of her wealthy celeb friends helping. After the release of the second e-mails to Epstein showing she lied, the friends and allies have gone silent.