Why isn’t this checkmate?

Sjmarf@sh.itjust.works to AnarchyChess@sopuli.xyz – 17 points –
8

Hi, this is a mistake many new players make. This is called a remis It you look closely, you can see that you actually don't have anybody playing on the opposite site. And if you don't have somebody to defeat/ be defeated by, it is considered a draw

Honestly white should have just resigned, all it does is delay black from mating 2 moves later.

There's a knook with a knight boost just out of frame.