Maybe a bit more data may help.
I have set the filter to only show photos from 03/04/2024.
– Photos dated on that day on or before 03/04/2024 14:26:42 GMT+2 are shown
– Photos dated on that day on or after 03/04/2024 17:09:31 GMT+2 are not shown
If I change the filter to show photos from the following day (04/04/2024) the first photo shown is dated 04/04/2024 06:04:40 GMT+2. So this does not show photos from the end of the previous day.
Therefore time zone is not looking like the culprit from what I can see.