Exporting only certain columns of submissions data is possible using the following process. Here's how you do it:
1) Access the Table Settings on your Submissions page and move the fields you'd like to export over to the 'Visible Columns' column. Move all other fields to the 'Hidden Columns' column. Click 'Save'.
2) In the new window, click 'Export All' and choose the appropriate file type.
This will export only the visible columns you chose in the preferred file format that can be shared out.
(The next steps are optional if you want to create a sharable link)
3) Click the 'Share' button and choose the option that works best for how you'd like to share this information. Click 'Done'
4) Click 'Share Link' and open the link in a new browser tab or window.
More information on sharing reports can be found here.