Keychain: Save more than just keys and certificates

Hello,

is there a possibility to store more than just keys, sticky notes and certificates in Apple's keychain?

In the best case I would like to store all important information for all kinds of websites, shops, logins etc.

Right now, there is just the possibility to store the website's corresponding log in credentials. This is great but I would like to add information like 2 Factor authentication method, Reset Codes, Addresses, Telephone numbers, Payment methods and so on.

Is there any chance to do this? Or is there any plan from Apple to achieve this?

Best Regards!