Preliminary report has been released https://www.ntsb.gov/investigations/Documents/RRD23MR005%20E...

It will take at least months and usually years before their report is complete. We may see a couple initial statements or abstracts, but it’ll take a while to complete their in-depth report.

NTSB Media Availability: Norfolk Southern Freight Train Derailment https://youtu.be/5NN6gjWT7dI?t=222