Hello JudgeJuryExecutioner,
Thank you for using Apple Support Communities! It sounds like message attachments are missing in an iMessage conversation on your iPhone. You're in the right place to find a resolution.
Are you able to find the photos following the steps in the resource below?
Use Messages on your iPhone, iPad, or iPod touch - Apple Support
- Open the message.
- Tap the name of the contact at the top of the message, then tap .
- You'll see Images and Attachments. Touch and hold an image or attachment to show options like Copy, Delete, and More.
To save an image or attachment outside of Messages, tap an image or attachment, tap , then select an option like Save Image or Save to Files. When you tap Save Image, it saves it to your Photos app."
If the photos don't show following the steps above, do you have Messages in iCloud currently enabled? If so, ensure that you have enough available storage on the iPhone to download the attachments, connect your iPhone to the internet and a power source, then see if the attachments will sync back to the iPhone:
Keep all your messages in iCloud - Apple Support
Cheers!