Reminders will be in the Calendar section of iExplorer since they are technically calendar data. Originally, Apple called them To Do’s and they were in the Calendar app, and then Apple created a separate Reminders app a few years ago, but the data is still all calendar data. So, here’s a tutorial you can follow for transfer calendar data:
Tutorial: How to export iPhone & iPad calendar events
Just like with calendars, any Reminders will export as calendar ICS files which is a universal calendar format that can be imported to any calendar app.
If you need additional help, please submit a support ticket HERE.