Hello,
the modem will not be recognized because it uses USB3.0 which uses the same pair of wires as the PCIe line. To put it into operation right in omnia, you need to stick these pins so they don’t have a contact (the modem will switch to USB 2.0 mode). I suppose you want to use the full speed of the modem and therefore I would recommend using an external box that connects via USB 3.0. I am afraid that overheating may occur when used directly in Omnia, and the heat sink will need to be used similarly to the modem’s instruction manual from the campaign. https://doc.turris.cz/doc/en/howto/lte_modem_install