The American Civil War Museum (formerly, the Museum of the Confederacy) has the following flag (remnant) in their collection:
Catalog # WD 442 : Flag of 23rd North Carolina State Troops (tentative). Captured near Hatcher's Run, Virginia, February 6, 1865 by Sgt. Daniel Caldwell, 13th Pennsylvania Cavalry. Identification based on modern research.
See : https://acwm.pastperfectonline.com/webobject/3455A639-F8B5-421F-BC89-405261914369