The Item Manager module is an optional module in the Portal. You might not have it installed.
Item Manager setup
It is possible to change the setup to meet the needs of the team.
The current setup is the default setup.
You will not have access to this, but it should be decided beforehand what is needed on which types.
New types can be created and existing ones changed:
All the mentioned fields on this screen can all have values changed, added, and removed.
In Use can be Yes or No