Disappearance of photos after updating to iOS 18.3

On my iPhone 15 pro max, after updating to IOS 18.3, all my photos before 05.09.2024 have disappeared from the camera roll. My photos from 2014 to now were there. Now, no photos from 2014 to 05.09.2024 are saved in the camera roll. I have not deleted them intentionally or unintentionally.

I have tried all the ways that Apple Support advise me in their articles,to get my photos back, but I have not had success. Please, can anybody here find a way to get my previous photos back.