Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb/STM32WB15_CM4/DMAMUX/C4CR#0x0
DMA Multiplexer Channel 4 Control register
DMA Request ID
Synchronization Overrun Interrupt Enable
Event Generation Enable
Synchronization enable
Sync polarity
Nb request
SYNC_ID
https://github.com/modm-io/cmsis-svd-stm32