Thank you so much. This worked for me, although it might not solve the top post here.

Same problem on NUCLEO-H563ZI.ROM Bootloader is accessable via UART and is able to download images.Setup host according to AN5405 FDCAN settings: ip link set can0 type can bitrate 250000 sample-point 0.75 sjw 16 dbitrate 1000000 dsample-point 0.75 ds...