Hello @JoanaChukova welcome to the Local Guides Connect community!
In addition to @ErmesT’s comment, I suggest to try the following:
- Delete one or more of those hidden photos,
- Slightly crop them with an image editor,
- Upload again to the same place listing and watch whether they are published now.
I wonder if you might have the same problem, I still have and reported here: Cannot upload images to reviews - #6 by WilfriedB