It shows up on the topic. 
You also get a notification. Approval is normally quite fast, but it’s an office hours thing, so roughly 8.30am-4.30pm Mon-Fri. Out of those (rough) times you’ll have to wait until Brenna is back at the computer. 
Edit: I’ve just re-read your message and spotted the ‘not’. When I asked Brenna just said that it disappears…