iPhone 11 Pro Max

Go to Photos > Albums, and tap Recently Deleted in the Utilities section. If you see the missing photo or video, you can move it back into your Recents album.

If you're missing photos or videos in the Photos app - Apple ...

When you use Messages in iCloud, all your messages—including photos and videos you send and receive—are stored in iCloud. If the photos and videos for a conversation haven't downloaded from iCloud to your Mac, you can download them manually.

Download photos and videos from iCloud in Messages on Mac

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