Psilocybin is very similar to the body’s own serotonin. Serotonin provides the opposite of depression. That is, namely, contentment. With increased stimulation of the serotonin receptor, the brain goes into a state of hyperconnectivity. This also happens to a lesser extent when you start dreaming. During the state of hyperconnectivity, various parts of the brain can communicate (better) with each other. Problems in the subconscious can become visible and it can get a place.

psylocybin brain connections -What exactly is paddotherapy?
On the left a schematic representation of the connections in the brain without psilocybin and on the right with psilocybin