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.
Well, I can confirm that no collections are showing up in my Data Breach Report in Bitwarden, despite HIBP.com listing 3 of them. So if Bitwarden should be listing them, it isn’t.
The exact API Bitwarden uses is https://haveibeenpwned.com/api/v3/breachedaccount/<USERNAME>?truncateResponse=false&includeUnverified=false" (link to code at bottom).
This requires a paid API key to use (if you want to try it yourself).
It is hard to determine where the exact issue is happening (HIBP or Bitwarden). Some possibilities include:
it is an unverified breach, since Bitwarden query excludes them.
maybe data in HIBP doesn’t have the specific email address you are looking up or something is missing