Your assumption in these remarks is "Sola Scriptura". An assumption that is never proved.
More specifically you demand explicit instances for anything "Catholic"......but Protestants ignore "explicit" "Catholic "texts all the time...
eg
(1)John 6 "Bread of life discourse" Protestants introduced a figurative interpretation that has NO support in scripture nor in The Church Fathers.
(2)"Thou are Peter...etc (Matt 16:18-19 cf Isaiah 22:19-23)
When Peter acknowledges Jesus as "The Davidic King-Messiah" , Jesus plainly lockstep references Isaiah's reference to the appointing of The Davidic Prime Minister/Steward, who ruled in the King's absence & carried The Keys of The Kingdom! This was a permanent & SUCCESIVE OFFICE.
How plain could it be?... but (in the past) Protestant scholars have invented all kinds of gymastics to "explain it away". They now acknowledge Peter is The Rock renamed by Jesus for this role.
Your related assumption is that today's Church must look exactly like the Church of Acts in a Reductionist manner......but even in this you are highly selective. (see below)
Christ described His Church/Kingdom as "A mustard seed that would grow into the largest of trees".
Because Protestants have made an idol out of The Bible they are condemned to forever seek the seed instead of The Tree.
Protestants are forever wanting to re-create The Acorn instead of sheltering under Christ's Oaktree.
But The Messiah....God's last Word to Man.....succeeded!
Even secular observers remark on the absolutely unique nature of the 2000-year-old institution of The Catholic Church; Present in every nation, vast but unified, outliving Empires; stalwart in doctrine, praying the identical divine liturgy worldwide every day. Unequalled (in breadth & depth) of Theology, Doctrinal Coherence, History, Reason, Spirituality, Saintly-witness, Mysticism, Scriptural Studies, Miracles, Philosophy, Education, Healthcare, Music, Art , Architecture and more.
Is she not the fulfilment of all the Messianic prophesies?
Is she is what she claims to be?
And what is the reason for the false-histories, misrepresentations, hatred, prejudice & vitriol against her? ( I have fequently been told online that the wonderful, beautiful. holy faith that I know.....is Satanic, Demonic, Pagan & Cultic.)
She is much too impressive, and too well-connected to the historical Jesus, to ignore....
So perhaps, hatred and thinking "(She) casts out devils by the power of Beelzebul" is the only defense against her motherly embrace.
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But OK .....Let's look at Acts and meet you on your own invalid turf..
The Book of Acts shows The Catholic Church & the OPPOSITE of Protestantism.
(1)The Apostles, and those they ordained, preached from an ORAL TRADITION. There was NO BIBLE.
(2)They taught "with AUTHORITY" as Jesus sent them "He who hears you hears Me, he who rejects you rejects Me, and he who rejects Me rejects Him who sent Me.” (Luke 10:16)
(3)They brooked no opposition & NO DIVISIONS
(4)They were sacramental using materials like water for baptism
(5)They used sacramentals/relics doing miracles through Aprons & Handkerchiefs of Paul & Peter's shadow.
(6)They were a Conciliar Church
When the first major issue of contention arose in the Church of Acts ("Must Gentile converts observe the Jewish Law?") what did they do? Peter, the Apostles & Elders had a Council at Jerusalem(chapter 15). They discussed; and made a decision of what was required; NOT BASED ON SCRIPTURE, but solely ON THEIR AUTHORITY & FAITH TRADITION.
They than sent their decision out to all the Church in a letter. (This was the first Ecumenical Council of The Catholic Church). The same Catholic Church still does this.
This is exactly how they settled the confusion over which writings were inspired & created the Bible.
It was the same Catholic bishops, & the same method, & the same authority.
NOW HERE'S WHAT THEY DIDN'T DO ....... In every local Church they said let's have a "Tanakh (Old Testament) Study". Then they all said "what the spirit is telling ME". Of course the "Spirit" told them all different truthes". So they said "Let's all do our own thing!; It doesn't matter as long as we "love Jesus" or "Have a personal relationship with Jesus" or "are born again" or "speak in tongues". And when we still disagree we can do Church-Splits or Church-Shopping".
The absolute hoot is, these types of Christians claim to be the "biblical" Christians!
Just how do they do it with a straight face?
Do they read the Bible at all?.... or just a few misunderstood anti-catholic proof-texts?