We’re pretty sure dark matter is just stuff that doesn’t interact much except through gravity (see https://www.lesswrong.com/posts/rNFzvii8LtCL5joJo/dark-matters ). And we think we know how gravity behaves with quantum mechanics when gravity is weak (though we have experiments set to test what we think we know, see https://www.newscientist.com/article/free-fall-experiment-test-gravity-quantum-force/ ).
We’re pretty sure dark matter is just stuff that doesn’t interact much except through gravity (see https://www.lesswrong.com/posts/rNFzvii8LtCL5joJo/dark-matters ). And we think we know how gravity behaves with quantum mechanics when gravity is weak (though we have experiments set to test what we think we know, see https://www.newscientist.com/article/free-fall-experiment-test-gravity-quantum-force/ ).