I got an email from Airbnb on July 16th with the following text :-
"Your registration number with Chicago is about to expire
Renew your number and keep hosting your space
As a host in Chicago, you’re required to register with the city and display a valid registration number on your listing page. Your current number will expire on August 15.
You can renew your registration number with Chicago from our website or mobile app--no trips to City Hall needed. Just review your renewal application, update anything that’s changed, and we’ll take care of the rest. If you don’t submit a renewal application within 30 days of your expiration date, we may have to remove your listing."
I did the update, and currently I show as "pending". Under "Regulations" tab on the listing.