Every docuмent of the Council ends with the solemn approval and promulgation by Paul VI's imaginary apostolic authority.
If you believe he had apostolic authority your Church's official, binding teaching is the whole of V2.
Also, parts of the council indicate heresies are contained in Divine Revelation, which is infallible language.
See here for ample proof:
https://schismatic-home-aloner.com/vatican-ii-infallible/
The pope does not make an infallible pronouncement just by approving something. One of the conditions for an infallible pronouncement is that the pope must say explicitly that he intends to bind every Catholic forever. Usually this is done in the negative form: "Whoever says such-and-such is not so, let him be anathema". This never occurs even once in the council text. On the contrary, once again, the council itself explicitly denies its infallibility.