That's my understanding of it. I think you have to link the different devices to the authenticator in order to retrieve codes on that device. Not a tech wizard at all, but I think it's just giving the assigned device an ability to receive a password to post. This prevents spam bot from using multiple devices to mass post using automated systems.
I deleted the extension, since I thought it was interfereing with the bluestacks android simulator. I haven't had a chance to try it yet, but prefer to use brave browser which isn't an option w/the browser extension. So since the android simulator is working for me now, will prob switch to brave, I'm on chrome now, and will just use the bluestacks simulator. But maybe this anon knows about this for instruction related to the browser >>17697442, >>17697446