be/have something to do with something idiom informal
C1 与…有关系
to be related to something or a cause of something but not in a way that you know about or understand exactly
I'm not sure what he does exactly - it's something to do with finance. 我不知道他到底是做什么的——好像和财务有关。
It might have something to do with the way it's made. 那可能和它的制造方式有关。