Where do you think intentionality comes from then? Not asking for a proof or a solid theory, just a punt to get us going.

Look at it this way. If humans evolved from bacteria, at various points in the last 4 billion years, there have to be stages at which you can look and say "this looks more like intentionality than the last stage that I looked at", all the way through worms, fishes, early mammals, lemurs, apes to us.

Unless bacteria already have intentionality, of course. In which case you are either postulating a moment of creation of life (= intention: and created by what? And what created the creator's intentionality?), or the problem is just pushed back until perhaps more research gives us evidence of a pre- bacterial reproducing form about which to ask the same question.

If intentionality evolved from non- intentionality, why can't another non- intentional process later evolve intentionality?