Christ became the propitiation for the whole elect world.
Yes, indeed. Christ died for the world of the elect.
I'll be citing snippets of verses for your instruction and edification.
Rev. 5:9 : because you were slain, and with your blood you purchased for God persons from every tribe and language and people and nation.
Rev. 7:9,10 : and there before me wasa great multitude that no one could count, from every nation, tribe, people and language, standing before the throne and before the Lamb. They were wearing white robes and were holding palm branches in their hands. And they cried out in a loud voice : "Salvation belongs to our God, who sits on the throne, and to the Lamb."
Rev. 14:4 : They were purchased from among mankind.
Rev. 17:14 : Because he is Lord of lords and King of kings --- and with him will be his called, chosen and faithful followers.
Eph. 5:2 : just as Christ loved us and gave himself up for us as a fragrant offering and sacrifice to God.
Eph. 5:23 : Christ is the head of the church, his body, of which he is the Savior.
Eph. 5:25 : Christ loved the church and gave himself up for her.
Acts 20:28 : Be shepherds of the church of God, which he bought with his own blood.
John 10:11, 15 : I am the good shepherd. The good shepherd lays down his life for the sheep. I am the good shepherd; I know my sheep and my sheep know me --just as the Father knows me and I know the Father ---and I lay down my life for the sheep.
1 Peter 1,2 : To God's elect, exiles scattered throughout the provinces of Pontus, Galatia, Cappadocia, Asia and Bithynia who have been chosen
1 Pe. 2:9 : But you are a chosen people, a royal priesthood, a holy nation, God's special possession, that you may declare the praises of him who called you out of darkness into his wonderful light.
2 Tim. 1:9 : He has saved us...because of his own purpose and grace. This grace was given us before the beginning of time.
2 Tim. 2:10 : Therefore I endure everything for the sake of the elect
2 Tim. 2:19 : The Lord knows those who are his
Titus 1:1 : the faith of God's elect
Titus 2:14 : who gave himself for us from all wickedness and to purify for himself a people that are his very own, eager to do what is good.