Does the Tribulation happen after the age of grace and after the church is gone?
Yes. The final seven years begin after the age of grace has ended and the church is gone. There is no longer an invitation to join a local congregation; instead, 144,000 sealed Jews go worldwide with the gospel of the kingdom, announcing that the King is coming.
Les explains that the age of grace has ended and the church is gone, so there is no longer an invitation to join a local congregation. Instead, these final seven years come on the scene, and 144,000 sealed young Jews go around the globe with the gospel of the kingdom, telling the world that the King is coming. He notes the vast difference between the gospel of the kingdom and the gospel of the grace of God. That kingdom message was also in Christ's earthly ministry. Israel rejected it, the King was crucified, God raised Him and called Him back to glory to sit at the Father's right hand until His enemies are made His footstool—an 'until' that marks when He will return to deal with His covenant people Israel. Revelation 7 shows the 144,000 sealed, 12,000 from each tribe, with Dan and Ephraim omitted because they first went into idolatry under Joshua.