The mushroom strain is edible yes, but I went looking around mycology forums and it is my understanding that decomposing plastic causes them to absorb chemicals that make them unfit to eat for humans. I think there's some overlap between "can be eaten" and "would be bad for you long term".
That's not to say there isn't a use for the mushrooms in some further process of dispersal or breakdown (animal feed, biogas...) but I don't think these can go in the stew pot.
That's not to say there isn't a use for the mushrooms in some further process of dispersal or breakdown (animal feed, biogas...) but I don't think these can go in the stew pot.