All of the air being purged during refueling goes through the charcoal bed.
As a matter of fact, my car even had (I removed it) a charcoal filter in the induction system to capture any hydrocarbon molecules that try to escape that way. When the engine is shut off, there’s always one cylinder with the intake valve open that was drawing in fuel. God for bid a molecule should find its way back past the open valve and out to the world.
The pages I posted are directly from Toyota, much more detailed than third-party repair manuals. There’s an entire section on this system, but in the interest of brevity I tried to post the important pages. I’m glad you were able to read them. I no longer have access to the Toyota databanks, so I took pictures of the pages, downloaded them to my computer, and attached them that way.