Media coverage, and thus wikipedia info, on this incident is a bit misleading. A lot of reporting assumes a separate CVR and FDR, but that doesn’t apply here. This is one of the first major incidents involving the 787 where that distinction matters. For example: https://www.bbc.com/news/articles/cjwqjv09q7xo

But, the 787 uses Enhanced Airborne Flight Recorders (EAFRs), which combine both cockpit voice and flight data functions. The functions are combined into a single unit. There are two units per aircraft: one located forward, one aft, providing redundancy. Each unit includes a Recorder Independent Power Supply (RIPS), which is relevant given early speculation about a possible electrical fault.

https://www.militaryaerospace.com/power/article/16718134/ge-...

From a 2012 incident, you can check out what kind of data the EAFRs pull in:

https://data.ntsb.gov/Docket/Document/docBLOB?ID=40431665&Fi...

For more on the data storage within the EAFR: https://skybrary.aero/sites/default/files/bookshelf/2955.pdf