Hi Samantha,
In here, you can find how to export data to an excel:
https://success.outsystems.com/Documentation/Development_FAQs/How_to_export_entity_data_to_Excel
And you can also take a look at this component:
https://www.outsystems.com/forge/Component_Details.aspx?ProjectId=355
Does any of these helps you?
Cheers,
José