According to Reformed theology, have Christians replaced Israel as God's chosen people?

As the gospel spread beyond Israel to the Gentile world, many began to ask important questions about God's promises to the Jewish people. In *Exodus 4:22*, God declares, *“Israel is my firstborn son,”* highlighting Israel’s special place in His redemptive plan. But with the coming of Christ and the message of salvation extended to all nations, we now see Christians referred to as adopted sons and daughters of God through faith. This raises important theological questions: Has Israel’s special status been replaced by the Church? Do Gentile believers now stand in place of Israel as God's chosen people? Or does Israel still hold a distinct role in God's unfolding story? This topic invites reflection on God's faithfulness, the unity of His promises, and how both Jews and Gentiles fit into His plan through the gospel of Jesus Christ.