The problem is we can not read all the pictures from a specific library. There are format differences like .png, .jpg but the occurrences seems to happen randomly because there are images in .jpg format displayed correctly and some aren't.
Sharepoint library column structure (not including default fields):
I have attached some images below to serve as an example. I had to censor the images but the edges are visible to serve as proof that there are images indeed.
- First.png - about what I can see on SharePoint
- Second.png - about what I can see in Power Apps inside a gallery listing all available items
There are only 6 images so far.
Thank you for all ideas and help in advance!