My child is going to bed easily and staying in the room but is awake for a while

It's great that your child is staying in his room but you still want him falling asleep in less than 20 minutes from you leaving the room.

If you notice that it's taking him much longer than this, move bedtime :15 minutes earlier. You are probably getting him down a little too late and he's already gotten a second wind which is keeping him awake.