I have yet to attend a Missa Cantata, whether it be Diocesan, FSSP, ICKSP, or SSPX, where the 2nd Confiteor was suppressed. Correct me if I am wrong, but in a Solemn High Mass, is not the 2nd Confiteor always said as the Deacon/ Subdeacon has to chant it audibly, regardless of the fact it is a 1962 Mass, where the 2nd Confiteor was made optional? This has been my experience attending Solemn High masses.