The V2 Goggles Firmware Situation - fpv-wtf/wtfos GitHub Wiki
Activating
Simply use DJI Assistant/DJI Fly to activate your devices. If required feel free to update to the latest version. You can always downgrade later.
Rooting
wtfos-configurator only supports rooting on the V01.00.0606 firmware. This firmware version must be displayed in the DJI FPV mode, DJI Digital FPV system a.k.a. DIY mode menus can lie about the actual installed firmware version.
If on any other version or in doubt please use butter to downgrade before rooting and installing wtfos on fpv.wtf.