Hello Snow Fairy: Thanks for sharing this concern here on PC. I noticed this is your first post. So... welcome to PsychCentral.

One additional forum, here on PC, that may be of interest to you would be the Healthy Parenting forum. Here's a link:

https://forums.psychcentral.com/healthy-parenting/

Hopefully you will receive some replies from members who've had personal experience with what your daughter is experiencing. In the meantime, though, here are links to some articles, from PsychCentral's archives, that may be of interest:

Is ADHD Actually A Sleep Problem?

ADHD and Sleep in Children

ADHD Linked to Disturbed Sleep in Children

Sleep Strategies for Adults with ADHD

https://psychcentral.com/lib/problems-related-to-adhd/

Sleep and Mental Health Disorders

I hope you find PC to be of benefit.