This description refers to the phenomenon of people believing that their thoughts and feelings are more obvious to others than they actually are. Illusion of Transparency is the idea that people overestimate the extent to which their internal states, such as their emotions, beliefs, and attitudes, are observable to others. It
From Wikipedia
The illusion of transparency is a tendency for people to overestimate the degree to which their personal mental state is known by others. Another manifestation of the illusion of transparency is a tendency for people to overestimate how well they understand others' personal mental states. This cognitive bias is similar to the illusion of asymmetric insight.