Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32h7/STM32H723/OTG1_HS_HOST/OTG_HS_HCTSIZ15#0x0
OTG_HS host channel-15 transfer size register
Transfer size
Packet count
Data PID
https://github.com/modm-io/cmsis-svd-stm32