‘We can do it too’: Meet Blackswan, the K-pop group with no Korean members
https://edition.cnn.com/2023/08/25/asia/blackswan-kpop-foreign-members-intl-hnk-dst/index.html
As far as song mainly consists of Korean language, we can say that it's K-pop. With globalization proceeds, there will be much more non-Korean K-pop artists.