Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l4+/STM32L4P5/OCTOSPI1/SR#0x0
status register
Transfer error flag
Transfer complete flag
FIFO threshold flag
Status match flag
Timeout flag
BUSY
FIFO level
https://github.com/modm-io/cmsis-svd-stm32