Unable to delete photos (iPhone 14 Plus), Transfer photos from iCloud to Google Photos

These pictures may have been transferred from a computer. Pictures that are transferred through a cable from a computer, perhaps with iTunes, can be shown by Photos, but they're not "owned" by Photos. So these pictures can't be edited or deleted by Photos, and they can't be synchronized by iCloud Photos The typically don't even show a trash can. The idea is that they are kept on the computer and transferred to the phone temporarily. One way to delete them is to use the computer to transfer an empty set of "pictures" to the phone, and the empty set will replace the others. In using iTunes for this, it may give the option to deselect the pictures that are already there. If you have a Mac, then you may be able to do it with the app Image Capture in your Applications folder. 

Another way to get rid of all the non-deletable pictures is to momentarily turn on iCloud Photos. You get a scary warning that these will be deleted. When you say OK, then they're trashed, and then Photos will start to transfer the other pictures to iCloud.But you can turn off iCloud and stop the sync before it happens.

If you want to save some of these non-deletable pictures, then you can use "Share" to save them to Files. Then re-import them from Files to create fully useable versions.

troyal147 wrote: …Not sure why it won’t let her delete other than her phone is full.

There you go! If there's not enough free storage, then even deleting pictures becomes impossible. You should have at least 10% free storage. You'll need to delete some little stuff before you can get to deleting larger files. You can't really depend on anything working right until you get enough free storage for the system to follow an app's instructions.

troyal147 wrote: iCloud is on but it is full

Same thing.