Pre-qualified at Citi guarantee or meaningless?

I just went on the website and clicked on the Citi double Cash card where it says see if I pre-qualify and it says I'm prequalified, what are the chances of me being denied if I apply now?

I know with Apple credit card and American Express preapproval is guaranteed, and with Chase credit cards if you already have an account with them and they show you preapproved with a green star as long as you don't pass the 5/24 that's also guaranteed. Likewise with capital one if you get the "accept offer" that's also another guarantee.

Is Citi prequalified guarantee or what are my odds of still getting denied?