"This is particularly problematic in countries with very few fact-checkers, where the volume of potentially false news stories and the limited capacity of the fact-checkers made it difficult for us to get ratings from multiple fact-checkers,"
Don't bother trying to make a list of the countries this statement applies to, they don't make a pad of paper that big.
There are only 249 Country Codes in the ISO Standard List, other lists of countries list fewer.
So, the list of countries that apply (All of them) would fit on five sheets of A4 paper, one per line, with the title "Countries with very few fact-checkers" at the top of the first page.
(My silly bit of pedantry for the day) ☺