Parallels 16 advertises that "In macOS Big Sur, Parallels Desktop offers an easier onboarding experience by using the native macOS system extensions instead of the deprecated kernel ones."
However, looking in System Information and Etrecheck, it is still loading 4 kernel extensions:
/Applications/Parallels Desktop.app
[Loaded] prl_hypervisor.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.11)
[Loaded] prl_netbridge.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)
[Loaded] prl_usb_connect.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)
[Loaded] prl_vnic.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)
However, looking in System Information and Etrecheck, it is still loading 4 kernel extensions:
/Applications/Parallels Desktop.app
[Loaded] prl_hypervisor.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.11)
[Loaded] prl_netbridge.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)
[Loaded] prl_usb_connect.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)
[Loaded] prl_vnic.kext (Parallels International GmbH, 16.1.1 49141 - SDK 10.9)