there is no “restoration” needed. the key to understanding the Scriptures is the OT contains types and shadows pointing to the coming of the Lord Jesus Christ into the world as a man to live a sinless life and give His life as a sacrifice for the forgiveness of sins to reconcile His people ( Israel ) to the Father. the NT tells about the life of Jesus, the early Church and Epistles from Paul which explain certain Christian doctrines in more detail. The NT explains how the OT types and shadows relate to Christ and how they were done away with when Jesus arrived.
One of these types was national Israel. For the most part, the promises made to Abraham were confined to the physical descendants of Abraham, Isaac and Jacob. but Jesus Christ cut off national Israel from being the custodian of the Kingdom when He cursed the fig tree and said it would NEVER bear fruit again and when He told the Jews their house would be left desolate and the Kingdom would be given to another nation ( this nation was the Church,the Israel of God comprised of all believers whether they are Jew or Gentile )
The NT tells us the true Jew is one inwardly, not determined by DNA.
The NT tells us not all who are descended from Israel belong to Israel.
The NT tells us “all Israel is to be saved” the clearest statement in the Bible that the Church ( the Body of Christ ) is Israel since the only ones to be saved are “in Christ”
The NT tells us the kingdom has been established and the Lord Jesus Christ is reigning NOW from the heavenly Jerusalem. His subjects are all those In Him, those who He purchased with His own blood.
The NT tells us you can’t seperate Jesus from His Church and this Church will be on the earth CONTINUOUSLY from Pentecost until Jesus comes back at the end of the world.
Satan CAN NOT overcome the Church, because Jesus bound Satan at the cross and the Holy Spirit leads the Church to all truth and protects the Church. Without the Holy Spirit, man can not understand the things of God, they are folly to him. But Jesus gave AUTHORITY TO THE CHURCH in Matthew 28:16-20.
the NT also tells us there will be false prophets who arise and will lead many astray. history tells us this is true. but the TRUE CHURCH is the one that has been here since Pentecost 33ad.
the NT also tells us there must come a great “falling away” in the Church right before the end. What do we see happening to the Church today? A GREAT FALLING AWAY!
so when someone says the true Gospel has not been preached for more than 2,000 years, we can dismiss such a person because such a person does not understand the Church is the Body of Christ, it is not a man made institution but a Divine One, it is protected by the Holy Spirit and led into all truth by Him and it will fulfill it’s commission received from Jesus Himself to teach and baptize until He returns to earth at the end.
the true offspring of Abraham has always been on earth since the promise was given to Abraham, only those with the eyes of Faith know who this offspring are. ( no “restoration” is needed )
this Faith is a gift from God, and i believe if you sincerely pray to God for this gift, He will send a Philip into your life like He did the eunuch in Acts 8.
God bless you.