Bitwarden will list breaches according to breach title that HIBP uses.
In this particular example, HIBP has labeled the breach "Title" as Cit0day
So, if HIBP detects your account has been breached, Bitwarden Data Breach Report will show Cit0day.
Another example would be the breach Collection1
The breach title HIBP uses is Collection #1, so this is what Bitwarden would show.
Bitwarden detects breaches by using HIBP API for a specific account:
GET https://haveibeenpwned.com/api/v3/breachedaccount/{account}
Details: Have I Been Pwned: API v3
HIBP should have updated their database with information on breach, so Bitwarden Data Breach Report should show all breaches related to the account you search.
Not sure if there is any other “easy” way to search affected sites.
A more technical way might be to use the bitwarden-cli to possibly query your vaults domains and then compare with all affected sites.