Seems like Nate is just repeating some stuff he read online. Khamzat's visa issues were before the Burn's fight and that's what was holding up making that fight official. He probably just saw on social media Khamzat getting married. It's his way to just put it out there like Khamzat has issues and that's why the fight isn't going to happen when in reality it could be something else, like Nate not wanting the fight. Nate has never wanted the fight since it was first offered, he kept trying to pass the fight on to his friend instead. Dana/UFC seems to want to make that fight to lower Nate's stock as he enters free market though.
Nate is being offered a lot of fights, he's just not accepting them.