The Bible will give us a sure answer.
In I Thess:4:16: the Bible says “For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trumpet of God: and the dead in Christ shall rise first…”
Matt:25:31: When the Son of man shall come in His glory, and all the holy angels with him, then shall He sit upon the throne of his glory:
Matt:25:32: And before him shall be gathered all nations: and He shall separate them one from another, as a shepherd divideth his sheep from the goats:
Matt:25:33: And He shall set the sheep on his right hand, but the goats on the left.
Matt:25:34: Then shall the King say unto them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world:
The Bible forewarns of what will happen at the advent of Christ’s return. So, let everybody prepare, and we pray for the living when they still have a chance to repent and turn to God.
When they die, it will be too late for them, for “it is appointed for man to die once, then face judgement”