Nothing Before the Rapture?

Jesus came and told his disciples, "I have been given all authority in heaven and on earth. Therefore, go and make disciples of all the nations, baptizing them in the name of the Father and the Son and the Holy Spirit. Teach these new disciples to obey all the commands I have given you. And be sure of this: I am with you always, even to the end of the age." (Matthew 28:18-20 NLT)

And the gospel must first be preached to all nations. (Mark 13:10 NIV)

This good news of the kingdom will be proclaimed in all the world as a testimony to all nations, and then the end will come. (Matthew 24:14 CSB)

No one knows about that day or hour, not even the angels in heaven, nor the Son, but only the Father. (Mark 13:32 BSB)

For you are fully aware that the Day of the Lord will come like a thief in the night. (1 Thessalonians 5:2 BSB)

For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever. (1 Thessalonians 4:16-17 NIV)

Listen, I am telling you a mystery: We will not all fall asleep, but we will all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised incorruptible, and we will be changed. (1 Corinthians 15:51-52 CSB)

This website Is there anything that must happen before the Rapture? - AskBible.org says rapture can happen anytime without warning.
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The answer is - nothing. There is nothing that must happen before the rapture - the rapture is imminent. We at AskBible.org believe this is what the Bible teaches. Let us see why.
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The rapture is imminent. But something will precede the rapture. The gospel must first be preached to all nations. If Christians are raptured before that happened, who is going to preach? So, the rapture will only occur near the end.

Now concerning the coming of our Lord Jesus Christ and our being gathered to him: We ask you, brothers and sisters, not to be easily upset or troubled, either by a prophecy or by a message or by a letter supposedly from us, alleging that the day of the Lord has come. Don't let anyone deceive you in any way. For that day will not come unless the apostasy comes first and the man of lawlessness is revealed, the man doomed to destruction. He opposes and exalts himself above every so-called god or object of worship, so that he sits in God's temple, proclaiming that he himself is God. (2 Thessalonians 2:1-4 CSB)

Don't let anyone deceive you in any way. For that day will not come unless the apostasy comes first and the man of lawlessness is revealed, the man doomed to destruction. (2 Thessalonians 2:3 CSB)