Best practices
Apply adjustments to all frames.
Keep Live Photo content intact.
Implement a great photo sharing experience.
Clearly indicate when a Live Photo is downloading and when the photo is playable.
Display Live Photos as traditional photos in environments that don’t support Live Photos.
Make Live Photos easily distinguishable from still photos.
Keep badge placement consistent.
For the complete guidance, including worked examples and illustrations, see the canonical page: https://developer.apple.com/design/human-interface-guidelines/live-photos