Kindly refer to the following link(s):
Woke up late for fajr, can we pray the fard first and then the Sunnah?
How to practice getting up early for Fajr?
Satan urinating in your ears if you don't pray Fajr
Set alarm for Fajr, heard athan while half asleep went back to sleep & prayed after waking up
Woke up when alarm went off, snoozed it off & missed the prayer, is this a major sin
Can we set the alarm 20 minutes before sunrise (for fajr) if we went to bed late?
If I missed fajr due to oversleeping, do I make it up immediately or later? (Shafi)
If I overslept/forgot & missed prayer, must I pray immediately (after time ends)