What are the rights of parents in Islam?
Short answer: Kindness, obedience in what is good, respect, financial care when they need it, and dua for them – even if they are not Muslim.
Allah joined His right with theirs: “Your Lord has decreed that you worship none but Him, and that you be good to parents. If one or both reach old age with you, do not say to them ‘uff’ nor repel them, but speak to them a noble word” (al-Isra’ 17:23). Obey them in what is good, spend on them when they need it, visit them, and make dua for them: “My Lord, have mercy upon them as they raised me when I was small” (17:24) – see the dua for parents.
Answered according to the Quran and authentic Sunnah as explained by the scholars of Ahl al-Sunnah wal-Jama‘ah. For your own situation, ask a trusted scholar.