Does iOS Keychain storage store in iCloud?

When choosing to remember passwords on MacOS, i see that the passwords are stored on keychain, but only on “login” keychain, and not “iCloud”. I understand that this means my password is never synced with iCloud (meaning only local access to my computer could divulge the password).

Now, on iOS when you use Face ID, or set Unlock duration to anything except “Let iOS Decide Automatically” it needs to store a copy of my key on iOS keychain. Does iOS keychain also only store locally on my iPhone, or does it sync to iCloud by default? This would determine if I will use this feature or not.

Thanks in advance.