If Tony was an Omega, the Alpha heroes would think he stinks
Apparently in these stories Tony is an Omega who everyone finds irresistible. Steve pines after Tony but Tony ends up with Stephen Strange and/or Loki, of all people. The reality is that neither Loki nor Strange (nor Steve, for that matter) has ever seemed attracted to Tony. And given all the stinky body spray Tony uses in canon, it sounds like none of the heroes would want to do anything except get away from Tony's stench.
Note: Apparently Alphas and Omegas are attracted to each others' scents. Or repelled, in Tony's case.
***
Tony lifted his arms and waved them about, making sure his irresistible Omega scent filled the room. He'd shut down the ventilation system in his office. He wanted to wow his soon-to-be Alphas with his Omega perfection.
He hoped that the sorcerer and the god didn't fight over him too long. He wanted the Alphas to realize that there was PLENTY of Tony to go around. Then all three of them could work together to get revenge on Team Cap. And fight off aliens or whatever.
It had taken Tony MONTHS of lobbying and blackmail to get the mating requirement law passed. It would get struck down by the courts almost immediately, but it would be in place long enough for Tony to get Loki and Dr. Strange as his Alphas.
They'd be forced to mate with SOMEBODY, so Tony would obviously be the best choice. Of course, neither Alpha knew that's why they were being summoned to Stark Tower. They thought it was some galactic emergency.
Suddenly two portals opened up in the room. Dr. Strange stepped out of one and Loki out of the other.
Dr. Strange clapped a hand over his nose and mouth and said, "What is that foul stench?"
Loki turned as green as his outfit and said, "I haven't smelled anything that awful since I was forced to hide in a cave that was knee deep in bat feces."
Both men waved their hands and the ventilation system kicked back on full blast.
Tony pouted and said, "So much for romance."
Loki looked around the room and said, "Why am I here?"
Dr. Strange frowned and said, "This had better not be a waste of my time, Stark."
Tony lifted his arms and said, "You know the law, boys: Every Alpha and Omega of legal age must be mated. So here I am, ready and waiting."
Dr. Strange turned to Loki and said, "He's all yours."
Loki said, "I'd rather mate with Fenris the wolf."
Tony frowned and said, "But I'm irresistible."
Loki said, "I think you mean undesirable."
Dr. Strange said, "Noxious...maybe toxic."
He turned and said, "I need to get out of here before I vomit."
Loki stepped next to the sorcerer and said, "I need to sit in a perfumed garden with a fragrant cup of tea after this. Care to join me?"
Dr. Strange nodded and the two magic users linked arms and stepped through a new portal.
Tony stood in the center of the room, shocked. Then he lifted an arm and sniffed. Maybe he did need a stronger deodorant.