I use secure notes with custom fields for license keys. As per my 1Password migration. Do those secure notes get checked for HIBP? Or just Login typenitems? Otherwise that would be your solution or a workaround?
That’s indeed an interesting idea. Unfortunately all my license keys are already type of “Login” (due to export from KeePass over to Enpass to Bitwarden over the years). It appears not to be possible to convert the entries in some easy way.
Beside that: I really love to have Favicons (for Logins) for my license keys as well. I have URLs for each individual project page of the license key with the corresponding favicon.