Hey there @userHG4gG5NuPE, I hope you're doing well.
Have you tried rebooting your device?
Yes, I've restarted it but it's still missing from gallery. I went to My Files and the pictures aren't there either but if I go to messages and attach I can attach them but that's it.
Hey @userHG4gG5NuPE, thank you for getting back to me.
Please try downloading a third-party gallery app such as Google Photo's or Google Gallery Go: https://play.google.com/store/apps/details?id=com.google.android.apps.photosgo
See if your photo's appear in these apps. Please let me know the results.
I had google photos already on my phone and the missing ones aren't there. I downloaded two more galleries including Samsung gallery and they are still missing from those apps.
Thanks for getting back to me @userHG4gG5NuPE.
Can you try wiping your system cache? To do this, follow these steps:
I hope this will do the trick. Please let me know. Take care.