Quick answer: Cats are naturally nocturnal and may wake you up due to hunger, boredom, or learned behavior.
Cats are crepuscular, meaning they are most active during dawn and dusk. If your cat sleeps all day, it may have excess energy at night. Some cats also learn that waking you up leads to food or attention.
Try feeding your cat right before bedtime, increase playtime during the evening, and avoid rewarding nighttime disturbances with attention or food.
If the behavior is sudden or accompanied by signs of distress, changes in appetite, or unusual vocalization, consult a veterinarian.
Most nighttime disturbances are behavioral and can be corrected with consistency and routine.