Have you checked the memory capacity of your new phone? It could be that whatever was on your iPhone 7 may have been in excess of the iPhone 11. Were any of your photos stored in iCloud? If so, that's where they still are.
Why did some of my photos not transfer to new iPhone?
If you haven't turned on iCloud Photos, iCloud Backup may include photos and videos in your Photos or Camera Roll. ... If iCloud Photos is turned on, then the photos were stored in iCloud Photos. If the photos and videos were included in the backup, they'll download to your iOS device in the background when you restore.9 Dec 2019
About missing information after you restore your iPhone, iPad, or ...