Depends on how white plays it.
At worst, if it goes N15-O14-M16-M17, then N16 kills that entire white group and black wins by almost 60 points. White could also choose to sacrifice the N14 stones after black ataris at N15, but if it goes O15-O14-N16-N14 then black wins by half a point!
So what white should do* is to sacrifice the stones on M19 after black playes that M16 throw-in, so if it then goes N15-O14-M16-N16-M17-O15 then white will indeed win by about 10 points.
But the thing is, whatever white chooses to do, they will need to add a stone there in gote before the game is finished. If white doesn’t, they will lose by a huge margin.
*white should have just played a move in that area instead passing multiple times, thats the most reasonable thing to do