But when are Microsoft going to come up with a click to install update - version 1909 will stop being updated soon!
Mel
I think they've done that already (at least for many devices). See Rezaul_K's post on November 9, 2020:
...

There seem to have been some interesting development. Windows update is offering this driver update which is newer than what we all have had previously. This might resolve the 2004 update block which I can't test at this moment because my Windows 10 Home is already updated to the 2004 version.
So Microsoft has provided a driver and it seems to work just fine for some of us. For example, I have a Lenovo Thinkpad Yoga 14 (20FY) and was able to install the new driver through Device Manager, Update Driver. A day or two later, the 20H2 version of Win 10 became available, I installed it, and it's been running fine for a month now.
Maybe your device wasn't one of those that this driver applies to? If so, they are at least providing information on a workaround that could help for some devices:
Microsoft shares workaround for Windows 10 Conexant driver issues By Sergiu Gatlan, January 25, 2021
https://www.bleepingcomputer.com/news/microsoft/microsoft-shares-workaround-for-windows-10-conexant-driver-issues/