No. You can emulate the network matters in software.
For more details, go look up the Linux USB Gadget framework.
You can even play around with some of it yourself using a Pi Zero 2 W (I did, making it appear to be a USB webcam - I saw guides on how to make it be a serial port and even an ethernet adapter too)
For more details, go look up the Linux USB Gadget framework. You can even play around with some of it yourself using a Pi Zero 2 W (I did, making it appear to be a USB webcam - I saw guides on how to make it be a serial port and even an ethernet adapter too)