If your child struggles to get back to sleep after more than 30 minutes, encourage them to get up and do something to calm their mind.
If your often child wakes and can’t get back to sleep, talk them through some things that might help. Ask your child what helps them relax, and see if they can try that next time they wake in the middle of the night. This might be:
Try to keep things dark, quiet and calm, and allow your child to fall asleep again on their own. That way, if they wake in the night they are more likely to drop off again without needing you there.