You can add a new Folder in the Photos app by scrolling down to the Albums section, tapping on "Albums >" and then on "Create" and Selecting Create Folder.
You cannot add Photos directly to Folders, you can add Albums either empty ones or with photos already in them
click here ➜ Get started with Photos on iPhone - Apple Support
Beyond that, not sure what you mean by "iPhone Face". You cannot add photos folders or albums to the Home Screen or Lock Screen if that is what you mean.
You can add a photos widget to the home screen that takes photos from a specific album or folder in the Photos app though.
click here ➜ Add, edit, and remove widgets on iPhone - Apple Support