Checkboxes and Leads using Power BI

I’m using Microsoft Power BI to extract my leads data from one of my Unbounce pages. I’m connecting to this URL: https://api.unbounce.com/pages/{page_id}/leads and inserting my page-id. I get all of the fields and data that my leads have filled in on the page EXCEPT the checkbox fields. I do not understand why the connection string is not showing the checkbox fields. Are these inaccessible through /pages/{page_id}/leads?

Thank you!