Separation of the body and mind is the essence of Cartesian dualism and Von Neumann was only an…
Roman Ormandy

Thanks for clarifying. I‘ve always thought of dualism as the belief that you need to add some extra ingredient to the physical world (whether it be a new substance or property) in order to account for consciousness (in other words, that mental states don’t supervene on physical states). But I can see how the phenomenologists you mention may have rejected dualism in a stronger way than functionalists have. There is a school of thought among AI researchers known as “embodied cognition” which has been influenced by Heideggar and Merleau-Ponty, and they would probably agree with you.