Funnily enough, my line of work has kinda forced me into delving a bit into Kpop. There songs are definitely catchy. It helps that 3 out of the 4 speak English as well. My personal favorite is probably Kill This Love. But in fairness, most of their songs are pretty formulaic to the point that they blend too much. Most songs start with a Jennie verse, Rosé and Jisoo alternate the pre-chorus, the chorus most of the time consists of a single line being sung, a repition sounds (oh yeah oh yeah, ddu du ddu du, ra pa-pa pa-pa pa-pam, wi padem, etc) and a musical repition. And Lisa coming in on the second verse. Repeat chorus, Rosé does a bridge, repeat chorus, outro.
That being said, they do have some standouts, but their most popular songs are way too much alike in format.