Can the PCIe x8 bus be split into 2 PCIe x4 busses?

The PCIe x8 bus of the AGX Xavier (interface C5) is connected to the PCIe x16 connector on the dev kit carrier board. Can this x8 bus be split into 2 PCIe x4 busses?

Hi, C5 means controller #5, one controller can only support one port simultaneously.

Thanks. I was afraid, that this is the case. Do you have a recommendation for a PCIe bridge, to split the x8 bus into 2 x4 busses?

No such info can share.