Huberman Labs podcast has done a lot of episodes on psilocybin and psychedelic research. The current understanding of the main mechanism of action is really cool.
Basically, psilocybin helps different parts of the brain communicate better. Of course, this can be undesirable if repressed trauma surfaces and their’s no one there capable of helping the person process the trauma.
But it’s also amazing because it can help us tune back into how children process information, openly and innocently, because that part of the mind is still there. Hiding under our egos (which we develop mostly as teenagers). Assuming we feel safe enough of course, to let our survival mechanisms (ego) go for a bit.