beyond11 wrote: … I’ve logged into iCloud and checked my Apple ecosystem of devices
That sounds odd. Do you use a Mac? If so, you should try connecting the phone and using the app Image Capture from the Applications folder. I've found some old pictures that way.
Of course, you should look in Recently Deleted and in Hidden. And be sure to check your Library thoroughly-- the pictures may not be where you expect, as dates may have changed. Get as much info as you can when you do see those pictures to help you. You can use the search field with the date or location. And remember, you can sort the Library by date captured or by date added. Also, your Library view on the iPhone now has filters, and you may not have your filter set to "All Items’.
Some pictures transferred, maybe with iTunes, from a computer can be viewed in Photos but they can't be modified by Photos, so there may be some operations that produce a warning about those being at risk. So if you’re missing pictures that were transferred from a computer, then you should look on the computer.
You can see this:
If you're missing photos or videos in the Photos app - Apple Support
Let us know what you find…
