All of the believers who we scattered from Jerusalem and Judea went everywhere preaching to none but to the Jews ONLY all the way through Acts chapter 11 (Acts 11:19).
How is any “perpetual” Church visible on Earth today like that group?
The Mystery of the Church.
Jew and Gentile believers, placed into one Body by an operation of God
not revealed to anybody until it was revealed to the apostle Paul.
“If ye have heard of the dispensation of the grace of God which is given me to you-ward:
“How that by revelation he made known unto me the mystery; (as I wrote afore in few words, {afore...: or, a little before}
“Whereby, when ye read, ye may understand my knowledge in the mystery of Christ)
“Which in other ages was not made known unto the sons of men, as it is now revealed unto his holy apostles and prophets by the Spirit; . . . “ (Ephesians 3:2-5)
No other Apostles spoke like this.
“Whereof I am made a minister, according to the dispensation of God which is given to me for you, to fulfil the word of God; {to fulfil...: or, fully to preach the word}
“Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints: . . .”
(Colossians 1:25, 26)
It was NOT revealed in the Gospels. The revelation of it would have required an understanding of the Cross-Work of Christ, which was NOT understood by any Apostles prior to the Resurrection of Christ. (Luke 18:31-34)
Peter and the Eleven could have well understood an Israelitish ekklesia, because such was prophesied in the Old Testament. They could have also understood the postition of the Gentile nations as being blessed with Israel (that is Israel when right with Jehovah). And the Twelve were promised twelve thrones judging the TWELVE TRIBES of ISRAEL (Matthew 19:28)(NOT judging the New Testament Body of Christ, nor being priests over them).
Peter himself said that All of the children of God today are priests (1 Peter 2:5), to offer up spiritual sacrifices to God (Hebrews 13:15, 16; Romans 12:1; Philippians 2:17; 4:18; etc.)
The Twelve, until the the conversion and calling of the Apostle Paul, had no revelation of a Church which is composed of Jew and Gentile believers in one Body, Joint-heirs together with Christ.