If Inventory Usage application shows no reservations when you click on Select Reserved Items button, please try the following:
Go to Organizations application > bring up the Organization > Inventory Options > Inventory Defaults and check if the option "Automatically create usage documents for new reservations?" is selected.
- If that option is selected, this is working as expected: in Inventory Usage application, instead of the reservations, you will see the usage documents automatically created while doing that reservations.
- Otherwise, please contact IBM Maximo Support and open a PMR reporting the problem.