Deuteronomy 22, 28 id a reiteration of exodus 22: 16 and 17
“If a man entices a virgin who is not betrothed, and lies with her, he shall surely pay the bride-price for her to be his wife. If her father utterly refuses to give her to him, he shall pay money according to the bride-price of virgins.
Exodus 22:16-17 NKJV
"If they are caught" ;because you cant hardly do anything if you dont catch them. However this does not make it not a sin. Fornication is strictly listed as a sin.
Note: fornicators in this list pf sin.
Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived. Neither fornicators, nor idolaters, nor adulterers, nor homosexuals, nor sodomites, nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners will inherit the kingdom of God. And such were some of you. But you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus and by the Spirit of our God.
I Corinthians 6:9-11 NKJV
https://bible.com/bible/114/1co.6.9-11.NKJV
Then Paul follows up with a particular warning about sexual sin.
Flee sexual immorality. Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body. Or do you not know that your body is the temple of the Holy Spirit who is in you, whom you have from God, and you are not your own?
I Corinthians 6:18-19 NKJV
https://bible.com/bible/114/1co.6.18-19.NKJV
Also notice in exodus if the father forbids the marriage the man still pay 50 shekels of silver.
So he pays the bride price is not allowed to have the bride if the father forbids, or is also not allowed to ever under any circumstances to divorce her. These passages are not giving any pass to fornicators.