I had an iPhone 5C for 4 years - all photos were backed up on iCloud. I know this 100% for sure.
I upgraded to the iPhone X and set up the new phone from the most recent backup. None of the photos came over into my phone, but I didn't think anything of it.
I just now went to iCloud and it says I only have 37 photos - I know I had over 500. All of the 37 are recent, but are from BEFORE the upgrade, so I know they backed up from my old phone recently.
Where are all my other iCloud photos and how can I get them back if they are gone? Please help! Thank you so much!