Creating a new Apple ID for my husband, who doesn't use iCloud
My husband and I have long shared one Apple ID, which is associated with my email address. I use iCloud for backups and storage but he has his iCloud turned off, which I assume then means all his information, data, photos are stored directly on his device, an iPhone XR. We would like to finally find a way to create a separate Apple ID for him but want to ensure there is a way to transfer everything he has stored on his current device to the new Apple ID. Is there a way to do this? We are planning a phone upgrade for him but want to have this figured out prior to doing that.
iPhone XR, iOS 15