After I opened a thread here and spent hours, I finally could identify my problem.
In short, many images did not appear on the site after they were uploaded to namecheap hosting (it was created on the localhost).
I noticed that since they had different characters before (eg é), our pictures were taken after uploading to the store (?) And therefore no pictures were displayed.
After talking to namecheap support more than ten times, they decided they could do nothing.
Now we have more than 5000 images on the page, so it is not possible to edit the images individually, as this will take days. I'm not even sure if there is a solution. please help