The Cyrillic Extended-A block spans U+2DE0–U+2DFF, 32 codepoints in Plane 0 (Basic Multilingual Plane). Every one of them is assigned in Unicode 16.0.
All of its characters belong to the Cyrillic script.
By general category: 32 non-spacing marks (Mn).
The first 32 arrived in Unicode 5.1 (2008).
Most characters here are combining marks. See combining diacritical marks.