Is it possible to build driver within the PiKVM image?

I just finished building an OS image based on: GitHub - pikvm/os: OS for PiKVM based on Arch Linux ARM

I’m trying to connect an external USB-to-M.2 B LTE module, and this Sierra module requires some additional drivers to be initialized.
I’d like to ask if there’s a way to compile the driver directly into a .o file so that it gets loaded automatically when the kernel boots.

It is possible, but I would highly suggest installing Arch on a separate Raspberry Pi and figuring out the necessary kernel configuration there, and then testing the setup steps in RW mode on a PiKVM that you have direct access to for troubleshooting for the short term.