In order to achieve this, you would need to configure the SDK PianoID client to specifically show the regular Identity Management login or registration template and NOT the Identity Management passwordless login template.
This wouldn't be a setting that can be changed, but you would rather be forcing the SDK to show the Identity Management login or registration template instead of the Identity Management passwordless template, which it renders by default if passwordless checkout is enabled.
You can set for example:
public var widgetType: WidgetType = .login
Please see our iOS SDK documentation here for more information.