It depends where your headcanon stops in canon. If you accept all of canon, according to Anne Rice, “Daniel

and

Marius love each other very much” in Prince Lestat. daniel-james-molloy asked Anne Rice that question explicitly and was answered without a definitive Yes or No:

[source]

Yes, Daniel was romantically involved with Armand in QotD; Armand is Daniel’s maker. So if your headcanon stops at that book, then they are still a couple.

Armand was romantically involved with Marius in TVA and B&G; Marius is Armand’s maker. 

Other people might accept all of canon, so for them, Daniel/Marius might be a real ship. They’re living together. Armand is living elsewhere with other vampires. 

But the vampire couple in Only Lovers Left Alive live apart and still love each other deeply, so it all depends on what your own headcanon of what a ship is. Can it survive long-distance? Can it survive polyamory? Does it have to be monogamous? 

These are the real questions 😉