Is a daughter considered the cause of her father's death if she invoked a curse upon him while he was angry with her, and will her repentance be accepted, and how can she reconcile with her sin after his death?

A son's prayer against his father is an offense that necessitates repentance for it and for any shortcomings in fulfilling his father's rights. For a father's rights are great, and harming him is an act of disobedience (ʿUqūq), and disobedience is among the major sins. The door of repentance is open as long as a person has not reached the death rattle. Islam has kept the righteousness towards parents open even after their death through supplication for them, seeking forgiveness for them, giving charity on their behalf, honoring their friends, and maintaining ties of kinship that are only connected through them.