You are correct: Chicken and egg problem.
More demand from consumers generates/encourages more infrastructure (Tesla Service Centers and Superchargers) from Tesla.
In the U.S. and Canada there is Plugshare and other options on how to travel and facilitate charging.
Norway and Northern Europe has filled in nicely, expanding Eastward and further South, into Iberian Penninsula, nearing Hungary, Romania, Bulgaria then connecting into Turkey.
Moscow looks kinda lonesome (currently).
Going back to your original question: maybe look @
https://supercharge.info/ site.
That MAP is a lot more accurate and current.
It takes time and money to build networks of Superchargers, distribution and Service Centers.
Looking back where Superchargers network was four years ago, Tesla has made
incredible strides.