Is it obligatory to make up the days that were fasted in Ramadan without performing ghusl after menstruation, knowing that years have passed since then and it was not intentional, and is expiation required in this case, and what is its amount in Saudi Riyals?

If you are certain about your fasting and doubt whether you performed ghusl before fasting, then nothing is required of you, because ghusl from menstruation is not a condition for the validity of fasting. However, if you doubt whether you fasted or not, it is more cautious to make up those days to clear your conscience with certainty.