Export iCloud items from Keychain to CSV

I want to export all my accounts login/password from Keychain. But you have many categories like : login, iCloud, System... in the Keychain menu. In fact I want to export them to 1Password, so I follow this overflow answer.

But in ~/Library/Keychains/ I have only the login.keychain and not the hopefully iCloud.keychain...

I have 422 accounts in the iCloud category and only 5 on the login category...

So my question is, how can I save/export this iCloud category

into a keychain or .csv file ?

EDIT :

I have already a login.keychain file. But I don't know how I can make an iCloud.keychain file.