Windows 10 Insider Preview Build 21343 Icons
Installing the new icons in 21H1
I purchased Icon Packager yesterday to install the new icons from Windows 10 Insider Preview Build 21343. Someone on Reddit extracted the new icons from the imageres.dll and shell32.dll libraries for download and I successfully installed most of the new icons. Unfortunately, Icon Packager has not been updated since the Windows 10 Fall Creators Update which was released in October of 2017, so some of the icons from 21H1 are not available. Icon Packager worked perfectly on 21H1 and I was able to implement most of the new icons.
Please consider an Icon Packager update once 21H2 has been released. This is an extremely useful app and I think an updated version would promote more widespread use.