Well it varies doesn't it. Like if a group has certifications in certain countries and can chart for weeks to months in those countries it's going to be relevant. Like there's no way to ignore something like Dynamite still staying in the top 10 in the US or Feel Special being the most streamed Kpop song in Japan this year/charting for 60 weeks or say The Album having 3m downloads in China. This is all relevant too. It's just much harder to track this metric for most groups since they might chart or get streams in foreign countries but they aren't really getting cert's or breaking records so it's tough to keep track. But yeah a top group should be making at least some noise in big markets like USA, Japan, etc by modern standards of what it means to be a 'top group'.