You can enable the Database Form to ensure that the submissions are viewable in a .CSV format.
Who can use this feature?
System Administrator | Owner
Instructions
Navigate to Modules and on the Content tab, select Forms
Select the category that the form lives in
Next to the desired form, select Choose an Action and then Modify
Scroll down and ensure Database Form is selected Yes
Note:
Any submission made when the Database Form is turned off will not be exported.
Select Save at the top of the page