I always see Kpop stans including all the songs where their faves were features, guests, or withs in a song when talking about their faves' charting accomplishments. They do it to inflate their faves' successes on charts like Melon, Hot 100, Spotify, etc.
But i really think this should be banned. No one calls Halsey a Melon chart topper, you never see her stans bragging about charting #1 on Melon or Gaon as a result of BWL. No one credits Selena with 100M Gaon Points because she featured in a BP song. Charting accomplishments should go to the main star responsible for the song, not the guests that they invited to collaborate on it.