I see no logical incompatibility between them. I was about to say that epiphenomenslism kinda renders it pointless to suppose that everything has a mind, but that’s really just an argument against epiphenomenalism generally, regardless of panpsychism.

Hmmm... you got me thinking... so the only way I see it in favor of epiphenomenalism in case panpsychism is true is to assume that:

1. atoms have mass, charge, spin, etc. + consciousness
2. consciousness does not interact in any way and does not play an active role in the Universe
3. mass, charge, spin, etc. influence consciousness, but not vice versa

*2. consciousness has an effect, it combines with itself

But I am wondering if what I have written is a panpsychist view itself.

That would be a kind of panpsychism and also a kind of epiphenomenalism, yes.

Thanks!