There's a hard problem in either case, I think.

If the mind is supported by or comes from the physical world, then the hard question is "why is there something it is like to be me"?

If the physical world is supported by or comes from the mind, then the hard question is "why is the product of my thoughts sometimes incredibly malleable and other times not at all?"

From a pragmatic perspective, there are certain events that behave the same whether the mind came first and is somehow restricted in certain capacities, or if the natural world came first and is imposing itself on the mind (through whatever supports it).

For instance, falling down stairs is going to hurt in either case. If the physical world exists independently, that happens because you either are or have a body which is also subject to its laws. If there's a mental monism, that happens because you can't shape all your thoughts, and those thoughts you can't shape act on some other part of you in a way that injures what you think of as your body.