Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32U599/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/cmsis-svd/cmsis-svd-data