In the Inventory → Hosts section inventory data of hosts are displayed.
Select a group from the dropdown in the upper right corner to display the inventory data of hosts in that group. You can also filter the hosts by any inventory field to display only the hosts you are interested in.
To display all host inventories, select "all" in the group dropdown, clear the comparison field in the filter and press "Filter".
While only some key inventory fields are displayed in the table, you can also view all available inventory information for that host. To do that, click on the host name in the first column.
The completeness of inventory data depends on how much inventory information is maintained with the host.