And is that a problem, you haven’t explained - but if you mean that they aren’t grouped on the Balance Sheet as per the example above then you haven’t done this step: group the “Inventory on Hand” on the BS to get a total Value.
Go to Settings > Chart of Accounts and next to Balance Sheet select New Group:
Enter a Name (Inventory on Hand) and for the Group select Assets.
Next, for each of your Balance Sheet inventory accounts, select edit and under Group select Assets > Inventory on Hand.
For the Reports - what you currently see are the only ones available but under the Ideas category there has been topic Request: Inventory Items Movement Report by groupings for improvements, which I will edit to also include via BS Custom Control account.