By default this search parameter is not visible in search view.
You have to configure it as visible explicitly in UI component workbench, configuration tab:
However, you can probably find that in some other systems, the fields listed in "Available Search Criteria" are far fewer than some other systems:
The reason is before all fields in search structure CRMT_PRIL_QUERY_ADVSEARCH_PROD is rendered in configuration, they will be filtered via design layer settings:
Those fields which are marked as hidden or do not have an entry maintained will be filtered out.
Finally there is a global switch which can revert this behavior. If no hidden is switched on, all hidden fields will also be rendered – this is current behavior in AG3.
After I switch on in HN1/504 this parameter can be configured in UI now.
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