Hello,
As of November, Pavlovia does not save jsPsych data to the server in pilot mode: Pavlovia piloting jsPsych plugin error - how to test that saving is working as expected?
But you could add the code for local saving of a csv to the end of your jsPsych code, as here: https://www.jspsych.org/core_library/jspsych-data/#localsave.
I think this should work for piloting purposes, but obviously you would want actual data collection (in Run mode) to use the CSV or Database feature on Pavlovia.
Hope this helps!