Yes, you are able to track and manage all the items listed on your marketplace as an Admin.
Simply click on “Items” button in your Admin panel (red box in the screenshot below). If you are receiving complaints or bad feedback on any items, you can switch the toggle under the column “Purchasable” from "YES" to “NO” (green box in the screenshot below).
The item will then no longer be visible on your marketplace and it cannot be checked out.
Alternatively, you may also delete the item if necessary by clicking on the delete button (blue box in the screenshot below).