And didn’t we just see disagreement on this thread over what makes up “ex cathedra” dogma versus Catechism doctrine? I can show you Papal bulls and council declarations that Catholicism went on later to annul and/or overrule. Just where is this “authentic teaching” supposed to be found these days?
The catechism of JPIi can be used with confidence that it contains authentic teaching. It can be found on Vatican website.