I am trying to communicate with your LTE module EG912Y from a linux-based SBC via USB. I suppose that cdc_ether class device and one or more virtual serial lines for AT commands (e.g. /dev/ttyACMx) should be available. But now, ACM does not appear as this module is not yet added to the mainline Linux kernel probably.
Can you please share a patch of the /driver/usb/serial/options.c to add support for this module (with VID:PID 2c7c:6001) ?