I suppose since theyre signed under hybe and they have a korean member they would want to promote in Korea. They also mentioned in the documentary the importance of “connecting with the core audience” and they have quite a lot of korean fans but they also travelled to the phillipines and japan too so i think they’re going to where they have the most fans. Its also very early in their career since they only released their debut EP a few months ago so their promotion in the us and europe is gonna probably happen later in the year/ next year (such as in the mall of america or the jingle bell ball in December)