What is the ruling on making up missed Ramadan fasts if the intention was not made from the night before due to ignorance of the religious ruling, and is it obligatory to repeat the fast along with expiation?

According to the majority of scholars, the intention for every obligatory fast must be made the night before, based on the Prophet's (PBUH) saying: "Whoever does not make the intention to fast before Fajr, there is no fast for him." This includes Ramadan, its make-up fasts (qada'), vowed fasts, and expiatory fasts (kaffara). Although Abu Hanifa differed on some types of obligatory fasts, he agreed with the majority that making up Ramadan fasts is only valid with an intention made during the night. Therefore, your friend's fasting to make up Ramadan with an intention made during the day is not valid according to the general consensus of the imams, and she must repeat fasting those days. As for past years, some scholars, like Ibn Taymiyyah, hold the view that repeating an act of worship is not obligatory for someone who performed it incorrectly out of ignorance and its time has passed.