Is there a general consensus amongst top chess players, composers, analyzists, and organizations, such as FIDE, for what exactly defines an en passant checkmate?
Is there any history for it?
As far as I know, there are two possibilities for what defines an en passant checkmate:
When the pawn does the passant, moving as to allow another piece's attack range deliver the checkmate.
When the pawn does the passant, and the pawn itself makes the checkmate.