Need Drivers for Raspberry Pi OS Bullseye Linux 5.15.61 on CM4


in this document, the USB driver guide, it is stated that there are available source files etc. Where can I download these files? Is this guide up-to-date for the latest Linux Kernel 5.15.61 on Raspberry Pi OS Bullseye on CM4?

Also, which is recommended: Gobinet or QMI_WWAN?