An overview presentation of the evolution of Eurocode 6 can be downloaded here EC6 Parts EN 1996-1-1 and 1996-3. It has been widely circulated to National Standards Body committees.
The European Committee for Standardization (CEN) Technical Committee CEN/TC250 continues to develop the Structural Eurocodes. Their current Business plan is available here https://standards.cen.eu/BP/6231.pdf .