We know that God has not already raptured the Church because of His long suffering, giving every human a chance to trust His plan of salvation. Do you think He will come back at a time when every person that will make a decision for Him will have done so, or will there be those who might have trusted Him at a later date, but be lost because He came back? Or do you think it is simply a number thing, when the full number of Gentiles has come in?
I believe Romans 11:25 tells us the Church has a specific number and when that number is reached the rapture will come. But that doesn’t mean there will be no more people saved. Rev. 7:9 speaks of a number too large to count from all over the world who will become believers and be martyred for their faith during the seal judgments of Rev. 6.
Rev. 20:4 tells us of another group of martyrs who will die for refusing to take the Mark of the beast during the Great Tribulation and will be resurrected at the time of the 2nd Coming. Neither of these groups will be part of the Church, but they’ll be saved just the same. Scholars call them Tribulation believers or Tribulation saints.
In Matt. 24:30 we learn that all the nations of Earth will mourn when they see the sign of the Son of Man in the sky following the end of the Great Tribulation. I think they’ll mourn because they’ll finally realize that what they’ve been told about salvation is true and it’s too late for them.
So all through the last seven years people will be getting saved, right up to the time they see the Lord coming in the clouds. Following that time no one can be saved until after the 2nd Coming judgments have taken place (Matt. 24:30-Matt. 25:46) and the counter is reset for the Millennium.