The modules we use (DART-MX8M-PLUS) can be flashed with uuu:
[687443.454421] usb 3-7: new high-speed USB device number 11 using xhci_hcd
[687443.582913] usb 3-7: New USB device found, idVendor=1fc9, idProduct=0146
[687443.582918] usb 3-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[687443.582921] usb 3-7: Product: SE Blank 865
[687443.582924] usb 3-7: Manufacturer: NXP SemiConductor Inc
[687443.584348] hid-generic 0003:1FC9:0146.0006: hiddev0,hidraw2: USB HID v1.10 Device [NXP SemiConductor Inc SE Blank 865 ] on usb-0000:00:14.0-7/input0
uuu (Universal Update Utility) for nxp imx chips -- libuuu_1.4.139-0-g1a8f760
Connected Known USB Devices
Path Chip Pro Vid Pid BcdVersion
==================================================
3:7 MX865 SDPS: 0x1FC9 0x0146 0x0002
Have you check if a new usb device is detected by the host (e.g. lsusb/dmesg)?