accordingAccording to me..shaw Shaw and davidDavid actually reached the planet where the engineered humans existed.But david But David due to obesessionobsession with his discovery of new human alien species kills shawShaw by giving her a pathogenic drink and after reaching the planet deliberately unleashes the pathogenic liquid on the residents of that planet due to which mass killing occurs and therefore the planet becomes desolate.The The planet is same on which alien covenant crew members landed.