Why do you see zero usage? You have not taken counts.
Do yourself a favor and take counts!!
If you really want the details:
If this is a new item and you do not take an opening count we assume zero.
Then let's assume you have invoices but no closing count.
We take the zero opening count plus the purchases and then, since there's no closing count we will assume you still have all your purchases on hand and thus you have not used any of your inventory.
So you have zero usage!!
You still have On Hand, but no usage.