Cool. I had a game against a 1500ish player where a pawn jump (over their king) was the only legal move of my opponent. I missed it when calculating and thought it was checkmate, but it turns out that due to the pawn jump I was losing my queen the following turn and was lost. Fortunately, my opponent resigned because they failed to find the pawn jump and thought it was checkmate. I thought I saved the game, but I can't find it now. I might be able to recreate it from memory if anyone is curious.
The pawn jump is real!
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I finally got a position where a jump+2 square pawn move was optimal.
https://www.chess.com/variants/spell-chess/game/83760880/58/3 (don't mind the gameplay, it was all to set up the pawn jump.)