Use Wifi on Intel NUC
Install firmware-iwlwifi
Info
Iwlwifi (Intel Wireless WiFi Link) is the driver for Intel wireless cards.
Add a "non-free" component to the apt sources.
Open the file /etc/apt/sources.list and add contrib non-free after main or just copy and paste following lines for Debian 11/Bullseye :
sources.list
deb http://deb.debian.org/debian bullseye main contrib non-free
deb-src http://deb.debian.org/debian bullseye main contrib non-free
deb http://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb-src http://deb.debian.org/debian-security/ bullseye-security main contrib non-free
deb http://deb.debian.org/debian bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free
Update the list of available packages and install the iwlwifi package
Finally connect to your wifi network
Use the gnome network manager to connect to your wifi network.