Pretty sure you would have to script that if you wanted to dynamically generate a dropdown list each time. List/record dropdowns are static otherwise. You can create dependent dropdowns without scripting though, where you pick one dropdown to give you differing options in the second dropdown based on the first selection. “Steps for Creating Dependent Dropdown Lists” SuiteAnswer 102865, is a good place to start if you want to go that route.

function dropdownFrmSavedSearch(savedSearchId, dropdownFieldId) {
varsearchObj = search.load({
id: savedSearchId
});

varsearchResult =searchObj.run();
varallResults =searchResult.getRange({ start: 0, end: 1000 }); // Set the range to retrieve all results (up to 1000)

vardropdownValues =allResults.map(function(result) {
return {
value:result.id,
text:result.getValue({ name: 'your_display_field' }) // Replace with the field you want to display in the dropdown
};
});

varfield = currentRecord.getField({ fieldId: dropdownFieldId });
field.addSelectOptions({
value: dropdownValues
});
}

You can also use for loop instead of “Map”