He'd leave for 5 jobs in the SEC alone. LSU, UF, UGA, UTex, & A&M can all offer him NIL support and a ceiling that UM can't. And that's assuming he doesn't want to deal with Bama crazy and rules them out. I don't know how he feels about coaching in a place like OSU or FSU. There's also the possibility he would go to a place like Miami even though it's not necessarily a better place to win.
Let's break this down:
LSU - after that crazy rant by the governor and the mess they made of firing BK, no wanted P2 sitting coach is going there.
UF - possible, but coaching there has been a train wreck since Urban left. With the portal, their HS recruiting advantage is not as great an asset as it was pre portal. Lane saw what happened to Mullen.
Texas/UGA/TOSU - yes any coach in the country will take these jobs, but none are coming open.
Bama - he left on bad terms, and after Saban, Mr. all football all the time, I doubt they want an childish coach who constantly feels the need to draw attention to himself and troll people online. They would never offer him.
Texas AM - possible, but ain't coming open.
Miami - he's not leaving for the U, maybe for the Fins though.
FSU - I think he would be a great fit and kill it there, don't know if he'd take it.
Were I an OM fan, the Giants would most concern me.
What Lane has in Oxford - he's bigger than the program and everyone is pulling in the same direction (Bama had the same deal under Saban), Lane is more powerful than the AD and likely the President. Apparently his family likes it there, his son is a raising star at OHS and they seem to be well funded NIL wise. He's a huge fish in a tiny pond.