Black ran out of time. White would have won, if white had sufficient mating material. One cannot mate with a Bishop and King, thus it is a draw.
Doubt about chess match

Hi,
Can someone explain me why this match is a draw?
Thanks
Black ran out of time. The site only looks at the material that the side with time has and king + bishop is considered insufficient material to mate on timeout here.
The site doesn't use FIDE's implementation of mate possible by any series of legal moves and had something more similar to the rule used by US Chess.
https://support.chess.com/article/268-my-opponent-ran-out-of-time-why-was-it-a-draw
Hi,
Can someone explain me why this match is a draw?
Thanks