Explain psychedelics, then? Do psychedelics have access to this supposed "separate layer" that mind exists on over matter? If yes, how? If not, how can something that ostensibly only interacts with the matter have any effect on the mind?
Can you explain any of this in a way that doesn't boil down to "it's magic and you just have to believe that it's happening because it is?"
What is there to explain about psychedelics? There is nothing special to them. They affect the bodily aggregates of a being and cause the contents of the experience to change. So does eating a donut. There is no contradiction with what I said because I already conceded that mind and matter are closely interlinked and that changes in the body affect the contents experienced by the mind.
But the "hard" problem of consciousness has nothing to do with the contents of the experience, but with explaining how experiencing of any kind is produced by aggregates that themselves do not have any such experiences. The simple answer is that mind (experience, consciousness, whatever you wanna call it) is not produced by matter and is a completely different realm of reality.
Maybe if science simply assumed that mind and matter are different things instead they would have made some progress. For once, the "hard" problem of consciousness would be revealed to not be problem at all. As for non-scientific proof that you have a mind, you can just observe that for yourself in every instant of your own personal experience. No magic involved. If people want to deny their own minds that is up to them.