If your Oculus Quest 2 gets stuck while trying to run the initial updates, please follow the steps below:
If you haven't already, plug your Quest 2 in with the charger that came in the box.
Wait at least 30 minutes, or until device sufficiently charged.
Your updates should resume automatically while your headset is plugged in and charging.
If the updates don't resume within 1 hour, please reboot your headset.
If you're still having trouble after trying the steps above, please contact Oculus Support.