GNU/Linux Debian Bullseye Installing Broadcom BCM4322 Driver Guide
The linked tutorial shows you step-by-step How to Install Broadcom BCM4322 Wi-fi/Bluetooth Driver on Debian Bullseye 11 GNU/Linux – Step by step Tutorial.
The Package Provides the Source Code for the wl Kernel Modules and makes use of the DKMS Build Utility to Install them for the Running Kernel.

GNU/Linux Debian 11 Broadcom BCM4322 Driver Installation Guide