Windows 10 Build 21343 Icons contains the new system icons extracted from our Windows Insider build. These are expected to be released to the public in the next Feature update in the second part of 2021.
Extract all the files to a folder anywhere you want (C:\Users\Downloads). You will need to change the icons yourself manually. The freeware app CustomizerGod might be of help.
We think you'll appreciate the new icons. They are more detailed, vibrant, and easy to look at.