Are psychedelics connected to dreaming? I mean, maybe dreams are supposed to somehow reset or recalibrate brains, but on some people it's not working for some r

Are psychedelics connected to dreaming? I mean, maybe dreams are supposed to somehow reset or recalibrate brains, but on some people it's not working for some reason. Also, there's a connection of what you eat and what you dream, so my wild hypothesis is that gut bacteria is responsible for recalibrating your brain during sleep. There's also quite strong evidence for correlation between gut bacteria and mental health. Somehow these are connected. Also, exercise, especially running has a mental health effect. Maybe it just mixes your gut bacteria.