Intel non-free wifi firmware,
lspci -nnk lshw -c modinfo iwlwifi dmesg | grep microcode apt install intel-microcode sudo apt-get install--reinstall linux-firmware |
https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html
https://wiki.debian.org/iwlwifi
https://forums.debian.net/viewtopic.php?t=152523
https://wiki.debian.org/Microcode