We say that we can experience thinking about an Apple, or imagining an Apple. I see no reason why a computer, or other physically implemented AGI system, could not do that. I suspect the act of imagination is just generating, processing and transforming a computational model abstracting the thing being imagined.
I believe brains are physical objects, so therefore physical objects can imagine Apples.
There isn't a platonic ideal "Apple" if that's what you mean by emergent phenomenon.
A collection of neurons can build a model of the world that includes its experience of apples, and from that, dedicate some neurons to representing a particular instance of an apple. This model isn't the reality of "Apples", though, and is physically located in the brain.
That's exactly my point. DeepMind has an idea of what a cat is based on its experiences, just as you or I do. Each of our models are woefully incomplete, based on very limited sensory information. These models all disagree with each other and reality to various degrees.
There exist many things many humans have lumped together under a single label such as "cat". Those categories are all wrong, but sometimes they're useful. Machines can also get in on the fun, just as well as humans, as you point out. There's no magic there, humans aren't special.
Free will is another one of those things that people love to trot out because it's so ill-defined. To cut through all the crap though, it's very simple: "free will" === "unpredictable behavior". This inherently means that it's observer-dependent.
This has the benefit that it empirically fits how people think about it. Nobody thinks a rock has free will. Some people think animals have free will. Lots of people think humans have free will. This is everybody trying to smush a vague concept into the very simple, intuitive definition above.
Which is all to say that free will is about as relevant to any conversation as say astrology is: not one bit.
If the extra thing dualism adds is just behaviours of matter, how is that different from materialism?