Upgraded to IPhone 12 Pro, used quick start, not all photos are showing up
I upgraded to the iPhone 12 pro today (previously used iPhone 8) and used Quick Start to transfer everything from my iPhone 8 to the 12. However, there are a lot of photos on my camera roll that are not showing up. The phone only displays a gray "photo" where it knows a photo should be but it does not show the actual image. I do use iCloud backup, however, I have filled the 5 gb that are free. But don't you think that the Quick Start direct iPhone transfer should have given my new phone all my photos regardless of if they are backed up to my phone? I am pretty sure my device knows the photos are there but it's not displaying the actual image or video that is supposed to be there.
iPhone 8, iOS 14