Screenshots from the webpage using Wayback Machine on August 21st show each country alongside its corresponding flag. The page now has no flags.
While a very subtle and seemingly insignificant change, there could be some valid reasons behind it. In October of 2019, Apple got itself in some very hot waters after removing the Tawainess flag from the iPhone keyboard for users who have their iOS region set to Hong Kong or Macau via the iOS 13.3.1 update.
As a Reddit user pointed out, the more recent controversy revolves around the Australian flag. Recently the Australian Football League announced that the Aboriginal flag, a flag which represents a small indigenous group of Australians wouldn’t be displayed at an upcoming AFL’s Indigenous Round. While hard to direct a correlation between it and the Australian flag itself, there have been calls in the past for Australia to redesign its flag.
Apple could be playing it safe, removing the flags entirely to ensure it doesn’t get itself caught up in hot waters again, or, there very well could be a simpler reason for the change.