Boot from the USB drive and run through the automated setup process. The installer will format the drive and deploy the pre-tweaked system.

Because Windows 10 versions 2004, 20H2, and 21H1 share a common core operating system with identical system files, the new features of 21H1 were actually present in earlier updates but lying dormant. The "Enablement Package" is essentially a small, fast-to-install "master switch" that activates these features.