Yes, it is! In many ways we see it. Let’s look at one of the places we find it.
He says, “It is too small a thing that You should be My Servant
To raise up the tribes of Jacob and to restore the preserved ones of Israel;
I will also make You a light of the nations
So that My salvation may reach to the end of the earth.” Isaiah 49:6
If you read the first fourteen or so verses of Isaiah 49 you will see something odd. It looks and sounds like a conversation; and it is. It is a record of Jesus and His Father speaking. What are they talking about? It is the plan of how Jesus will come to earth to rescue mankind. And in that conversation, we read this verse. And we see this statement. What does that mean?
Well, many years later we read this in Acts “but you will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth”. Acts 1:8 The “remotest parts of the earth”? What is that? That refers to the “nations” in Isaiah 49:6. The nations are the non-Jews, the gentiles. They are referred to many times as “the nations”. In fact, in Isaiah 49:1 it starts out with “you people from afar”.
And just who is going to reach these far away people? Keep reading! In Acts 1:14 and 15 we see a group of people gathered praying and worshipping. It is a local church (the first one). This is who God is sending to the nations. In fact, to the entire world.
So, we do see the local church in Isaiah!