I found this info (the part that says “Added a Case that starts with IOE“. Maybe it will apply to us that have IOE cases and the website asks for that “online access code”.
I’m gonna wait until I have the NOA1 and if it doesn’t include the access code then I’ll request it, I guess.
https://redbus2us.com/visas/usa/uscis/create-uscis-account/#:~:text=If you have a USCIS,birth to verify the same.