Summary
The Chargeback Management feature (supported on selected gateways) is used to track/settle disputes raised by end customers automatically.
You might want to export a list of transactions that were refunded to customers as part of the Chargebacks.
Solution
This can be done by navigating to Logs->Transactions-> set the filter as Payment Method is Chargeback
This will give you the list of all transactions that are chargebacks.
Note: On the recent UI enhancement you can now scroll the index pages - Customers, Subscriptions, Invoices, and Credit Notes vertically. Earlier, the pages will be paginated which may prolong your search however with the new enhancement as you scroll down the list it will load all other data in a single page as highlighted below on the screenshot. Refer to this link for more information.