You can view a list of existing inventories via the main menu: Asset Management → Inventories. If the inventories do not appear in the menu, check the permissions in the section Users and Groups → Users → specific user → Permissions tab → Asset Register → Inventories. Filters and column editing work here the same way as in Asset List.
You can edit existing inventories by double-clicking the relevant row or by selecting Edit from the context menu 
. You can create a new inventory by clicking + Add.
Export Inventories
Just like in the asset list, you can also export this data to XLSX. Select the columns you want to export and click the Export button.