Re-read the sentence I quoted:
Urged by faith, we are obliged to believe and to maintain that the Church is one, holy, catholic, and also apostolic. We believe in her firmly and we confess with simplicity that outside of her there is neither salvation nor the remission of sins, as the Spouse in the Canticles [Sgs 6:8] proclaims: ‘One is my dove, my perfect one. She is the only one, the chosen of her who bore her,‘ and she represents one sole mystical body whose Head is Christ and the head of Christ is God [1 Cor 11:3]. In her then is one Lord, one faith, one baptism [Eph 4:5].
I bold-faced the part that disputes your above false assertion.
There is no NT requirement to believe in a church just as there is no Biblical teaching of the need to believe in Mary for salvation as espoused by Rome.
There is nothing in the bull that says one must believe in Christ for salvation.
Not sure what you’re trying to get across here. Claiming that that Francis isn’t really Pope because of his wickedness?