For some time photos I upload don’t go to the New Photos tab. It just stopped one day and now I’m lucky if I get a single like on a picture. Doesn’t matter if I upload and delete them to try again, they don’t get published in New Photos. Tried asking admin but as usual there’s no answer.
I assume that you have marked the photos as “Public” - I wouldn’t expect them to be shown if they were marked as “Private” or “Friends Only”.
Probably stating the obvious but we all make the odd mistake sometimes.
