Where and why photos disappear but stay in timeline

[manmanmanman]

Hi.
My mother came back from a trip and she could not find her photos anywhere exept in her google maps 'time line'.
We looked at the gallery and in Google Photos and it is not there, and it appears only in google maps - your timeline, and we see places and the photos from it.
1. Why is it not appearing in the gallery?
2. How can I find the photos saved location?
3. How can I save them back for me?

Thank you

 

[IAmSixNine]

Its possible your mom deleted them.
Did she use stock camera app to take pics?
Did she remove the memory card if she had one?
several things could have happened.