Sierra EM9291 module not enumerating as a usb device on imx93

[jyijyi]

you can see here:

Problems Getting EM9191 Working with M.2 to USB Adapters

See if this helps:

For your m.2 adaptor: you need to check these pins for connecting with USB:
pin 20 → high (1.8V), pin 22 → high (1.8V)