Note that if White had opened their bishop diagonal (1... P-3d) instead of 1... P-2d, then a Bishop Exchange opening would no longer be possible since Bishop Exchange openings have Black's bishop positioned on 7g followed by their left silver positioned on the same 7g.
The rook pawn option (shown here) is more suggestive of a Bishop Exchange opening since White is threatening to exchange eighth file pawns before Black exchanges pawns on the second file which may lead to White gaining the initiative.