What is the ruling on making up the days one did not fast while traveling, and at times did not fast due to sleep and missing prayers, knowing that one had fasted and broken fast in accordance with Saudi Arabia?

It is permissible for a traveler on a lawful journey to break their fast, and they must make up the days they missed. If the fast was broken without a legitimate Shari excuse and without sexual intercourse, then you only need to repent and make up the fast. If you are unsure about the number of days you missed, then fast until you are reasonably certain that your obligation has been fulfilled. Prayer holds a great status; therefore, you must repent for neglecting it and make up what you missed. Excessive sleeping during the day in Ramadan is disliked but does not affect the validity of the fast. You must adhere to the sighting of the crescent moon in the country where you started Ramadan. If there is a difference in moon sightings between your country and Saudi Arabia, and you broke your fast with Saudi Arabia, then you must make up one day if their sighting was earlier.