Criteria is the same all over the world. A need for pokestops is not criteria. Here is a link explaining what is and is not eligible:
In addition, I will link a topic with suggestions for points of interest you can try to look for:
The Wayfarer team understands that it can be difficult to establish game locations in some areas. They are currently conducting experiments with assigning Pokestops:
As was suggested, please do share screenshots of a rejected nomination or removed accepted nomination that you don’t understand.