This european map is only showing stops in somewhat big cities, there are certainly thousands not pictured (I am inferring this from the french map at least, it make sense for readability though).
Our third most used train station in Sweden is not included in that map. Makes me wonder what criteria they used.
Same for the U.K., Germany, The Netherlands, and Switzerland based on my experience in each; however this is the opposite of my concern, as I’m saying the American map that Amtrack are trying to show off with looks worryingly blank.