You can use "Data Item Browser" to explore what fields are available for your specific instrument.
Type in "DIB" on Eikon Search Bar and press enter to launch "Data Item Browser".
For more information about Data Item Browser, please review this document.
Or alternatively, you can contact Refinitiv Content Helpdesk to ask on the field name carrying the information you are looking for.
They can be reached at https://my.refinitiv.com/