if you already the type that women are attracted to then yes, broadcasting that youre out with and doing stuff with a woman will definitely make them pursue you more / pique their interest. i dont use IG, but i imagine its especially the case if the woman's face is hidden and its in your story...versus outwardly posting that you have a girlfriend in your pictures for the world to see.
women have FOMO and are competitive. they also love mystery. if they know its your girl then only the wack homewreckers would be intrigued. but if its just random women who are unidentifiable...