[RnMomof7]

Very few pronouncements of the magisterium are declared infallible in an explicit way. The idea that for something to be authoritative it must be pronounced ex cathedra is a faulty premise.

There is no official magisterium commentary on the entire bible in 2000 years ..If the church is the only one that can interpret scripture then the church should have an infallible commentary of the entire scriptures .

What you have is bits and pieces done by various authors all giving their OPIS

There is no comprehensive commentary tying together ALL of the OT with the entire NT ...so Catholics have a puzzle missing many parts..

[Deo volente]

The ordinary magisterium is part of the teaching authority of the Church and has interpreted Scripture in countless encyclicals, letters, exhortations, catechisms and documents of Ecumenical Councils. These are all part of the official teaching of the Church and are binding, in a greater or lesser degree, on all Catholics. They are considered to be authoritative and reliable.

The Church saves infallible pronouncements for those times when an explicit definition of a doctrine of the Faith needs to be expressed.