1 Thessalonians 4 says the dead rise first then we which are alive shall be caught up together with them in the clouds.
Is it your opinion then that once everyone meets up in the clouds they all come back to earth for the final harvest?
No. Only the 144K, Jesus, and the angels are on the earth for the final harvest. The OT already had their time of harvest, during the OT. They did not stay on the earth nor did all return for the NT harvest.
The church already has had their time of harvest. It is currently ongoing. They nor the OT redeemed come back for a second go.
The final harvest is all about who is alive on the earth at the Second Coming. This harvest is the firstfruits of the Millennial Kingdom.
God does not just instantly destroy 6 to 8 billion souls without explanation. Nor will the church, those alive and remain, have an opportunity to make up for not bringing in the harvest they should have. We are to serve and harvest souls now in the present. So, no, the church does not get a second chance to make up for failing the lost around them.
Matthew 13:36-41 states Jesus Himself is sowing the gospel and the angels gather the harvest.
"Then Jesus sent the multitude away, and went into the house: and his disciples came unto him, saying, Declare unto us the parable of the tares of the field. He answered and said unto them,
He that soweth the good seed is the Son of man; The field is the world; the good seed are the children of the kingdom; but the tares are the children of the wicked one; The enemy that sowed them is the devil;
the harvest is the end of the world; and the reapers are the angels. As therefore the tares are gathered and burned in the fire; so shall it be in the end of this world. The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity;"
I am not saying that many are not serving God and being obedient. Paul said there would be a great falling away. People will get burned out, that is why no one really knows who will have to endure to the end. Although all should endure until the day they leave this earth. There is really not any excuse not to endure.
The Millennium is not for the church, neither OT nor NT. The church comes down in the New Jerusalem. There really is a Paradise where the church is waiting until God is finished with this current creation. They may already be sitting in judgment. We have not been told the full revelation of God's plan. Only glimpses in Scripture.