This is not checkmate. For checkmate the king has to be in check, which is not the case here. If the king is not in check and there are no legal moves, it is stalemate, which is a draw. That is the case here. Any move by Black would put his king in check but he is not in check now. Stalemate.
1 pawn and 2 kings condition for check mate
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If it is black to move, is he checkmate or not?
What are options for black to be checkmate?