How to decrease automation page objects using composition

HeaderComponent.java

public class HeaderComponent {
    //All of the things related to the Header go here

    //Elements related to the header section
    //Methods to interact with the header
}

IndividualItemComponent.java

public class IndividualItemComponent {
    public void addToCart(ItemType itemType)
    {
        //actions to add the item to the cart
    }
}

InventoryCollectionComponent.java

public class InventoryCollectionComponent {
    IndividualItemComponent item;
}

InventoryPage.java

public class InventoryPage {
    HeaderComponent header;
    InventoryCollectionComponent inventoryCollection;
}