This feature requires a Cartegraph OMS license.
If the user does not have access to the Asset page, but still has create permission enabled, the Asset type still displays in the Create menu.
If the user does not have create permissions for an Asset type, the Asset type does not display in the Create menu.
Why can't I see an asset on the Asset menu?
If an asset type does not display on the List view in Cartegraph OMS, but you can see that the asset is synced to GIS, then that user does not have permissions to that asset type. Permissions are setup within Administration>Role Administration.