Could jetson xavier nx use two usb3.0?
now it can use one usb3.0 port:usb3-2.
No. Only one set of USB3.0 roothub has pinout on Xavier NX module. If you need more USB3 ports, would need to utilize the PCIe bus and use PCIe to USB controller.
Could Xavier Nx do it like TX2 can change UPHY lane assignment by ODMDATA?
No support to change ODMDATA of uphy for NX and AGX.