What time of the day are you concerned about?
If it's during the day time, that is normal for them to stay in the pouch they are nocturnal and don't usually become active till 8pm ish, even then they don't always stay awake all night long, they eat, play, go take a nap and repeat all through the night.
If it's night time, and you are turning a bright light on it is also normal for them to go in the pouch or stay in the pouch, Use a dimmer light or indirect light to check on them.
Staying in the pouch while their human is away is kind of normal and not a big concern.
If they weren't in the pouch, and are on the floor of the cage, or in the wheel sleeping during the day is when I would be concerned.