CN60, replace wifi with mpcie ethernet?

Has anyone successfully replaced the mpcie Wifi card in a CN60 with a mpcie ethernet card? Or know why it would, or would not work?

I’ve tried two different mpcie ethernet cards (different brand/chip.) Neither seems to be recognized at all, not even as an unknown device, whether I boot Linux or Windows. (I have a Ventoy stick so lots of boot choices.)

lspci/lshw don’t show the ethernet devices, nor does Windows device manager.

I have tested with a different model Wifi card, which works, as does the original, so the slot is fine.