Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x7_CM4/OTG_HS_GLOBAL/OTG_HS_DIEPTXF8#0x0
OTG_HS device IN endpoint transmit FIFO size register
https://github.com/cmsis-svd/cmsis-svd-data