Well, she's one of the few Kpop soloists who's doing US promotions, and you can't chart on HOT100 if you don't do that, so it's not really a competition.
She has massive numbers for sure, but the fact that IU is #1 without any PR outside of Asia is a much bigger achievement. Especially because she's not part of a massive girl group, either.
Also, BoA's records are impressive as hell. She's in this industry for 24 years, yet only Lisa and Jisoo had bigger pre-orders since 2003! Only TWO Idol beat her record after 21 years!
So, for me, this is what I call "The Biggest" or "The Best".
Idols like BP or BTS members doesn't need any PR, let's be real, okay? Her fans always say, she has 100M followers. Youtube, Insta, FB, Tiktok, Billboard, Rolling Stones etc always writing articles about her/their comebacks. If that's not a massive PR, I don't know what is, because there's only 2 or 3 group that all these platforms promote OFFICIALLY. BP, BTS and maybe TWICE or some other boy group, but that's all.
Yesterday, I saw Youtube's official Twitter page posting about Hwasa's cb, but that's all.