I created a site called
www.bitrawr.com to do just that, list the safest exchange to buy Bitcoin in each country. What am I missing?
You definitely miss the local crypto exchanges. You focus only on more or less known global exchanges, and their availability in individual countries. There is no big difference in the number of exchanges for Zambia (9) or USA (12), and from what I check biggest number of crypto exchanges for one country is 14.
To add local crypto exchanges try to search them by using keywords : crypto local exchange / country.
I personally know several pages similar to yours, this one may be one of the most famous.
https://www.buybitcoinworldwide.com/