Ok, I've done so much research at this point, I've almost given up. I
have two identical Asus AC66U-B1 routers. One is set up as the primary
router, the other as a dedicated AP for my Quest 2 (not a mesh node, an
AP). The primary router is one story ...
You aren't going to get an official reply here. You said you already
chatted with them directly, and that's the only true way to get an
"official" reply to your specific problem.
I've already done the transition, so I understand what you're saying.
But, have you carefully gone through the Meta/Oculus account settings
and made sure the facebook account was in fact severed? I haven't yet.
And, even if you can't see the facebook...
Meta, for this announcement, should have explicitly stated the (minimal)
versions, for the headset, the desktop app, and the phone, that one
needed to have before transitioning. Even if you think you have the most
recent version of the firmware, many...