A Microsoft file hosting and synchronization service.
Hi Brayden Granville
I understand that you took a photo via the OneDrive app and since you did not complete the upload, you logged out of the app.After logging back in, your previously taken photos disappeared.
Unfortunately, in this case the data cannot be recovered, the previously taken photos are in cached form, once you exit the OneDrive app in the background, then the cached data will be cleared.
In order to prevent sync anomalies due to network problems and server fluctuations, we recommend that you use your phone's camera to take photos before syncing.
We look forward to your reply.
Best Regards,
LucyW-MSFT | Microsoft Community Support Specialist