I need to move photos back to my daughters phone

Hello vperri6,

Thanks for reaching out to the Apple Support Communities.

It sounds like you and your daughter shared Apple IDs. Therefore your Apple ID must be signed into your daughter's iPhone and the Download and Keep Originals for Photos options should be checked in iCloud Settings.

Setup and use iCloud Photos

Once the Photos are downloaded to the device, you may turn them off in order to keep them on the iPhone. It should say "Keep on my iPhone" when you attempt to turn off iCloud Photos.

Once iCloud Photos are turned off, you'll sign out of your Apple ID and sign back into your daughter's new Apple ID. Following the same article: Setup and use iCloud Photos the photos will be uploaded to your daughter's iCloud account.

Note: You will need to delete your personal photos from your daughter's iPhone. There is no easy way to do this other than manually.

Once you are signed into two separate Apple IDs, you'll only delete the photos from your daughter's iPhone which will not delete the photos from your iPhone.

The photos from your iPhone will only delete if you're signed into the same Apple ID. Therefore, once you delete the photos, they will not be removed from your iPhone as she's logged into her Apple ID only.

What didn't work?

If she has sufficient space on her phone and is connect to her iCloud account, she can turn off Optimization and full resolution photos will eventually be downloaded to her phone.

You are welcome. If she has enough space there is no need to use Optimization.

Good.