Perhaps we should look at the tenses of the verbs in passage?
In all of these, our new birth happens when Yeshua comes back (we receive an actual new body). (Yes, I know that there are those who equate justification as the New Birth but I see only "raised up a new creature in Christ") But, until then, we receive the indwelling spirit of God to teach us, convict us, and help us get through the life we now live. Being "saved" has tenses. All of us are now "being saved." But, our hope is that "we endure to the end" so that we will be saved. When Jesus returns and we receive our glorified bodies, that will be our new birth without corruption as it was before Adam sinned. Consider how we live now knowing that this world is not our home. We are not yet "born again." We are merely justified and seeking to know God more fully and serving him with our actions (sanctified).
I realize that all this goes against what churches today teach. Please consider, if we are already "born-again", we would no longer have to go in front of God to see if our names are in the Lamb's Book of Life. But, as we know, we still battle sin in our lives. Please just prayerfully ponder these with an open mind.
1 Jn 3:2 Beloved, we are God’s children now (present tense), and what we will be has not yet appeared; but we know that when he appears we shall be like him, because we shall see him as he is.
1 Th 4:16–17 For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God. And the dead in Christ will rise first. Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air, and so we will always be with the Lord.
2 Co 5:1–5 For in this tent we groan, longing to put on our heavenly dwelling, if indeed by putting it on we may not be found naked. For while we are still in this tent, we groan, being burdened—not that we would be unclothed, but that we would be further clothed, so that what is mortal may be swallowed up by life. He who has prepared us for this very thing is God, who has given us the Spirit as a guarantee. (We have God's spirit to help us to "endure to the end.")
1 Co 15:42–46 So is it with the resurrection of the dead. What is sown is perishable; what is raised is imperishable. It is sown in dishonor; it is raised in glory. It is sown in weakness; it is raised in power. It is sown a natural body; it is raised a spiritual body. If there is a natural body, there is also a spiritual body. Thus it is written, “The first man Adam became a living being”; the last Adam became a life-giving spirit. But it is not the spiritual that is first but the natural, and then the spiritual.
Re 3:3–5 Yet you have still a few names in Sardis, people who have not soiled their garments, and they will walk with me (future tense) in white, for they are worthy. 5 The one who conquers will be clothed (future) thus in white garments, and I will never blot his name out of the book of life. I will confess his name before my Father and before his angels.
Jn 6:39–40 And this is the will of him who sent me, that I should lose nothing of all that he has given me, but raise it up on the last day. For this is the will of my Father, that everyone who looks on the Son and believes in him should have eternal life, and I will raise him up on the last day.”
1 Co 15:22–23 For as in Adam all die, so also in Christ shall all be made alive. But each in his own order: Christ the firstfruits, then at his coming those who belong to Christ.
Php 3:20–21 But our citizenship is in heaven, and from it we await a Savior, the Lord Jesus Christ, who will transform our lowly body to be like his glorious body, by the power that enables him even to subject all things to himself.
Ro 6:3–5 Do you not know that all of us who have been baptized into Christ Jesus were baptized into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. For if we have been united with him in a death like his, we shall certainly be united with him in a resurrection like his.