This is not what rooting means, you can install .apk on every Android phone but not every can be rooted.
At the moment Quest 2 cannot be used without FB account, root access would allow installing modified firmware without that requirement as well as creating 3rd party application stores browsable on device itself.
I know this thread is 4 days old, but in the interest of utility if you search up "bypass oculus quest facebook ADB" you can find some handy guides to skipping the facebook login requirement to allow running sideloaded apps only.
The device has not yet been rooted though, so the bounty hasn't paid out.
I know what rooting means, and I'd kindly ask that you read a comment before replying to it. I was stating that you can already make homebrew apps, and you can already use third-party, on-device app stores. I didn't say it was already rootable.
Further, you can also use a Quest 2 without a Facebook account. I do, myself. It's pretty well-documented.
