There is no option to format the exported files. Not sure how is the phpmyadmin export related to this topic, but many users want to export query results, filtered users data etc. through their site CMS, the same way as they upload data to their site for example.
Ok I noted your latest reply that you have no plan to make this new modern export tool to support PDF or XLS export. I asked this question because I need to decide whether I should upgrade the export extension. What I need is updated version of extension like Universal Data Exporter PHP that also supports PDF and Excel formats. Thank you for your clarification.