I don't think so.
It's more focus on the concept of an alpha with omega caracteristics. (From my point of view)
I remember Low Tide in Twilight had a pair of enigma alpha, but i don't think this one is.
I’ve read the novel, no, both are alphas, just one has a small percentage of omega traits in them, an enigma is an alpha who can get any other alpha pregnant. This one it’s specifically one of them has omega traits and the other alpha has a VERY sensitive nose like a bloodhound, and can discern very the very smallest amount of that in the scent
Is this story where one is an enigma? I know there is a BL like this forgot the name