Yes, Mercy on all (Romans 3:9) ( both Jew and non-Jew)
Mercy shown to all, but all will Not accept God's mercy.
This is why Matthew 20:28 says that Jesus' ransom covers MANY and does Not say all.
Since Pentecost (Romans 2:28-29) Not a Jew by fleshly descent. Now a spiritual Israel (Christian congregation)
Remember: Romans 9:6 because " Not all who descend from Israel are really " Israel " (now spiritual Israel - see 1 Peter 2:9,5)
'Repent' or 'perish'(be destroyed) - 2 Peter 3:9
“Then came one of the seven angels who had the seven bowls full of the seven last plagues and spoke to me, saying, “Come, I will show you the Bride, the wife of the Lamb.” And he carried me away in the Spirit to a great, high mountain, and showed me the holy city Jerusalem coming down out of heaven from God, having the glory of God, its radiance like a most rare jewel, like a jasper, clear as crystal. It had a great, high wall, with twelve gates, and at the gates twelve angels, and on the gates the names of the twelve tribes of the sons of Israel were inscribed— on the east three gates, on the north three gates, on the south three gates, and on the west three gates. And the wall of the city had twelve foundations, and on them were the twelve names of the twelve apostles of the Lamb.”
Revelation 21:9-14 ESV
Not sure what you’re saying, God isn’t finished with the nation of Israel, the gospel came to the Jew first and then the Gentiles, yes mercy on all, but all will not be believers, some will reject the gospel. As you can see who the Bride of Christ is here in Revelation.