Why doesn't NgxsFeatureModule contain a module definition (ɵmod property)?

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The NgxsFeatureModule is a simple module that provides some configuration options for the NGXS store. It functions as a "helper module" and is not intended to be imported directly into the application.

This module is used to group together feature state classes and define some general options for them, such as whether or not they should be reset when the application is reloaded or if they should persist across sessions.

Since the NgxsFeatureModule is not meant to be imported directly into the application, it does not require a module definition (ɵmod property). Instead, it is included as part of the overall NGXS store module, which does have a module definition.