I managed to find a colleague with a newer iPhone, with ZA in the model, and Hong Kong as Region. The flag appears when language is set to English but disappear

I managed to find a colleague with a newer iPhone, with ZA in the model, and Hong Kong as Region. The flag appears when language is set to English but disappears when language is set to Traditional Chinese (Cantonese). The conditions to have the flag disappear are not that widespread though, but the news is indeed real :-)