The first genre listed in Ateez's Wikipedia infobox is K-pop.
Wikipedia places K-pop before hip hop, trap, and EDM in the group's genre field. K-pop is a broad industry and musical category associated with South Korean popular music, while the other entries describe styles and influences that appear in Ateez's sound.
The ordering matters because the question asks which genre is listed first, not which genres Ateez uses. Hip hop, trap, and EDM are also listed, so choosing one of them would identify a real part of the group's musical profile but would not answer the infobox-order question. Ateez's music frequently combines rhythmic rap, electronic production, dramatic pop structures, and performance-focused arrangements.
Ateez was formed by KQ Entertainment and debuted in 2018. Its artistry is often associated with powerful choreography, theatrical concepts, and an ongoing narrative built across album series such as Treasure, Fever, The World, and Golden Hour. Those varied influences explain why several genres appear in the infobox, but K-pop remains the first classification shown.