The Attendee Information field isn't showing up when submitting expense reports through Spreadsheet

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Description (Required):

We have established policies enabling employees to input attendee details for specific expense types. While we can select attendee details from the front-end interface, they do not appear when attempting to create expense reports through the spreadsheet. Are we overlooking a step required to display these fields when submitting expense reports through spreadsheet?

Use Case and Business Need (Required):

Enhancement Request / Service Request: