About TLS variables

Hello, I found the Variable %c only has TLS, Can it be using "TLSv1, TLSv1.1, TLSv1.2, TLSv1.3" instead of only TLS  like as dovecot logging, this is really a most meaningful , thanks 

Variable         %cLong name securedDescription “TLS” with established SSL/TLS connections, “TLS handshaking”, or “TLS [handshaking]: error text” if disconnecting due to TLS error. “secured” with localhost connections. Otherwise empty.