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The official answer is that you cannot promote a pawn to a king, so this situation would never arise. However, this is Anarchy Chess, so let's set that aside.
If this situation did happen, and it is Black's turn, it is not checkmate, because Black's bishop takes the queen. It could not be White's turn, because there is no way to arrive at this board state on Black's turn without one or both kings being in check at the beginning of the turn, and so Black's move would have needed to remove their king from check.
Therefore, this board state is not checkmate.
The bishop is on strike as modern religious conditions makes his day-to-day services auxiliary and thus he will not attack until he gets paid
One of the kings could still pay the bishop, so still not checkmate.
Except that the bishop won't actually receive the funds until the next business day, which would be too late. Now of course this wouldn't be an issue if the payment could be made in cash, but due to the distance between the bishop and the kings, the only option is an electronic transfer.
Since it's anarchychess the bishop rejects their Mastercard, but it would accept Bitcoin. However the kings lost their Bitcoin to a scammer the week before.
They could, but you have to think about the bottom line and how it would affect the shareholders