Your vault holds more than passwords. Saving a secure note works the same way as a login: a title and free text β recovery codes, licence keys, anything you want encrypted.
A password manager that only holds passwords leaves the rest of your life on paper. Card numbers, account details and recovery codes are the things people end up photographing and emailing to themselves.
The entry appears in your vault immediately and syncs to your other devices. Search finds it by name, and the filter chips narrow the list by type.