I guess the part that I notice in this connection is 6:3:
‘Then the LORD said, “My spirit shall not abide in mortals for ever, for they are flesh; their days shall be one hundred and twenty years.”‘
This comes in the context of one of the most weird bits in the whole Bible, so I’m reluctant to be too definite about what it means! But perhaps it’s relevant? It may just mean ‘breath’ – God breathed life into Adam, and is now shortening the time that it will remain in his progeny. But perhaps it could make space for the idea of life as body+spirit.
I certainly think there’s no hint that humans have an IMMORTAL soul here. If anything, humans are naturally mortal, given that the punishment they receive is to be removed from the tree of life, which would otherwise have been endlessly nourishing them with the immortality of the ‘only immortal’ God (1 Tim 6:16).