Why Are People Curious About Their Presence On Private Apps

A few days ago I was talking with a friend about online privacy and digital footprints. During the conversation, we discussed how some platforms allow users to post about others quietly. That idea stayed in my mind because it feels unusual not knowing where your name appears. Later I found Tea Checkerapp while searching, and it seems people use it to check such things. It made me think more about awareness. What do you all think about this topic?