The new operating system for the iPhone and iPad, iOS 11, has caused some quirks.
The biggest quirk is iOS 11 saves photos as .HEIC files, not a .jpeg/.jpg files.
Google can see .HEIC files but can’t add them through the usual Insert-> Image process as you normally would when working in a Doc, Slides, or Drawing file. There are solutions, however. And the solutions are fairly simple.
I have outlined a few simple solutions to the Google HEIC conflict in this tutorial:
Let me know if you have any questions.