Jetson NANO PEX signal pinmux

I’m studying the nano SOM , for an product. I need two USB3 HOST (no hub due to area constraint).

When looking into pin mux sheet (
I don’t see any mux possibility on PEX signals, as it is on Jetson TX1

For instance on Balls named PEXx_X3x only PEX0_x1x signal are available while on TX1 we have also on SFIO1 USBB_SS2

Are USB_SSX mux (SFIO1) missing in NANO mux sheet for PEX, or do they really not exist on NANO SOM (and embed “x1” IC so)

Hi, please refer to lane mapping table in OEM DG in DLC, only one direct USB3.0 port is supported on nano.