It is important to understand that the document itself makes explicit that the Church’s teaching on marriage and human sexuality is unchanged. Nor can it change. The teaching office of bishops and the Holy Father is at the service of, and has no authority over, the Deposit of Faith as found in Sacred Scripture and Tradition. (...) Any misappropriation of the teaching office of the Church in a way that normalizes sin contributes to leading people further from Jesus’ loving heart rather than closer to it, and must be repudiated. Thus we must have a clear understanding of what the Church teaches, even while the virtue of prudence helps us to know when and how to admonish sin in practice. There should be no ambiguity as regards this truth: the ministers of the Church have no power to bless sin.
https://www.sfcatholic.org/bishop-degrood/wp-content/uploads/sites/28/2023/12/Joint-Letter-of-Fiducia-Supplicans.pdf