The flash algorithm ST_STM32L476G_Disco_QSPI.elf assumes that the QSPI flash uses the pin layout below (same as on the ST ST_STM32L476G discovery board):
QUADSPI_BK1_IO0   PE12
QUADSPI_BK1_IO1   PE13
QUADSPI_BK1_IO2   PE14
QUADSPI_BK1_IO3   PE15
QUADSPI_CLK       PE10
QUADSPI_BK1_NCS   PE11

The flash algorithm ST_STM32L496G_Disco_QSPI.elf assumes that the QSPI flash uses the pin layout below (same as on the ST ST_STM32L496G discovery board):
QUADSPI_BK1_IO0   PB1
QUADSPI_BK1_IO1   PB0
QUADSPI_BK1_IO2   PA7
QUADSPI_BK1_IO3   PA6
QUADSPI_CLK       PA3
QUADSPI_BK1_NCS   PB11

The flash algorithm ST_STM32L4R9I_Disco_QSPI.elf assumes that the QSPI flash uses the pin layout below (same as on the ST ST_STM32L4R9I discovery board):
QUADSPI_BK1_IO0   PI11
QUADSPI_BK1_IO1   PI10
QUADSPI_BK1_IO2   PI9
QUADSPI_BK1_IO3   PH8
QUADSPI_CLK       PI6
QUADSPI_BK1_NCS   PG12