Unable to connect to wireless as of update 22 Jan

After upgrading with the 22 Jan updates on my raspberry pi 4 8GB Networkmanager was no longer recognising a wireless interface. Thinking I may have made an error somehow I decided to reinstall slackware from scratch on booting into my fresh system I found the same problem plus with no wireless being recognised... in addition to the X displaying freezing in XFCE4.16, but this has already been reported on in another thread. My config.txt file was unchanged from the default one shipped in the install.

Unfortunately I can not supply any data concerning wireless as my pi is the only computer I have and had to install raspian in order to use the internet. As far as the wirless is concerned everything was functional until the update. I appreciate that this may not be very helpful but I am wondering whether it was an issue other people have experienced?