I think I started reporting this situation six or seven years ago.
It is indeed a strange situation. Basically, even if the images are public (visible to everyone in our profile) some do not appear in the POI.
The last case happened to me less than a month ago.
On December 31st I went for a walk in the Cansiglio forest, to relax and take some photos in preparation for my post “1000 Shades of White” - The Cansiglio National Forest
During the walk I met some sled dogs in training. In fact, there is a school nearby where sled dogs are trained. I took some photos and videos, then I checked if there was a listing in Maps.
Indeed there was, with only one totally irrelevant photo plus the one from Street View
So as soon as I got home I chose and uploaded three images (one with the name of the school) and a video.
The video and two images were uploaded, while the third (the one with the name and logo) was blocked.
I immediately appealed and in a few hours that photo was uploaded too.
However, if you go to look at the listing, only the video is visible.
The other images are not present in the listing, even if they are visible in my profile
Two of the images also have some (few) views, while the one initially removed, and then “officially” published has no views, even if in my opinion it should be the “Cover Photo” of the listing
It seems that Google’s algorithm decides which images are relevant for the POI, and decides not to publish those that are not.
As I said, this is a fairly common situation, which I have been reporting for years. In the case of this example, which is quite “extreme”, I escalated it to the team so that they can use it as a “case study”.
Upload the same photo more than once is not a solution, @anon53600968, but you can try to edit a bit your photo and see if it will be published.
In any case I would like to ask you an additional question, @anon53600968 : Is that place a business? I mean, no opening time, no phone number. To me it looks like a private home