Yes that is the popular interpretation. Those converted after the rapture. But it is only an interpretation. In any event, it makes little difference. Salvation doesn’t depend on it.
Another example of the Rapture is Noah and the flood.
God sent a flood (a shadow and type of wrath to come) Yet Noah and his family were raised by the Water (water signifies a cleansing by the Word) through Faith believing. Only Noah and his family were “caught up”. This represents a remnant.
Those who denounce God’s ability to raise BOTH the dead and THE REMAINiNG are walking by sight based on science and NOT the Word of God.
2 Corinthians 5:6-8
King James Version
6 Therefore we are always confident, knowing that, whilst we are at home in the body, we are absent from the Lord:
7 (For we walk by faith, not by sight:)
8 We are confident, I say, and willing rather to be absent from the body, and to be present with the Lord.
Perfect!