Conor McGregor was given his fight purse after the showdown in Las Vegas, but Nurmagomedov's is yet to be released.
McGregor was beaten in Las Vegas when he tapped out in the fourth round following Nurmagomedov administering a rear-naked choke.
The UFC lightweight champion took to to Instagram on Tuesday to poke fun at UFC president Dana White over what repercussions White would have faced had he stripped Nurmagomedov of his belt after Saturday's post-fight brawl.
Nurmagomedov's fight purse has been withheld while the NSAC investigates.
One camera angle has shown that members of the Russian's entourage leapt into the ring to try and get to McGregor, with Zubaira Tukhugov attacking the Irish fighter from behind.
McGregor was issued a 30-day competition suspension by the Nevada Athletic Commission (NAC) after the bout, among several short-term bans for fighters on the card in what is a common move after MMA bouts, with no contact allowed until October 28 before McGregor's ban expires November 6. I do not think that that should happen. You just beat him while the whole world was watching.
The Russian apologised following the incident but cited pre-fight trash talk in which McGregor "talked about my religion, talked about my country, talked about father".
White defended against critics who said the promotion had stoked the flames of the brawl by highlighting an infamous bus attack by McGregor.
Conor McGregor's teammate, Dillon Danis, didn't let a swollen face and head injuries keep him from having a good time after UFC 229.in fact, he went to the nightclub after his scrap with Khabib! "You won. The guy who's yelling at you means nothing".
"We have to see how this stuff plays out with Khabib", White said.
"If you want Khabib", said Rockhold, a former UFC middleweight champion, "he'll want a record-breaking number".