Hi, you may try this; it worked in my local net-work. If you have the same circumstances as I have ...
... as far as I see you need to uninstall the November-update; then you can uninstall the Oktober-update KB5006677; but: I got an error-message trying it; you might be more lucky than I was. So try it.
If you succeed in this deinstallation you are back in September and you can now copy the "win32spl.dll" from "windows-system32" directory and save it elsewhere. In case that you cannot do this because of access-restrictions look below for help to get full access.
After the system has reinstalled the Oktober and November-updates - if you did not prevent it to do so - you can exchange the now again present bad version of "win32spl.dll" with the good version that you saved in the first step after having uninstalled KB5006670.
For this you have to configure the "properties" of this bad file: you must give the adminstratror "full rights" for the system-file "win32spl.dll" in order to be able to rename or delete it. Here is shown how to do this:
https://www.youtube.com/watch?v=0-xQ6s2EdVI
To get full access to "win32spl.dll" should be possible without much difficulty, if you follow the instructions.
With this done you can rename the bad dll-file and copy the saved good win32.spl.dll into its place.
You have to restart the system then. And: You may perhaps have to reconfigure your network-printer afterwards, but in principle the here discribed operation works.
If you DO NOT succeed in deleting KB5006677 and getting the good win32spl.dll you can give notice and I could show you another way of getting the dll. But first try the deinstallation-strategy. I hope you attain your goal with it.
Get back your network-printing feature.
Regards
Jan Janssen