Is there any biblical examples about “the one”?

Yes, in Genesis 24:14, we have an example of this phrase “the one” being used directly followed by a reference to God’s sovereign plan to bring a man and woman together in marriage.

“Let the young woman to whom I shall say, ‘Please let down your jar that I may drink,’ and who shall say, ‘Drink, and I will water your camels’—let her be the one whom you have appointed for your servant Isaac.”

There is no perfect person for you, no soul mate, and sometimes God has people marry more than once, like after a spouse dies. However, when you use the phrase “the one” to mean “the person God has planned for you to marry,” this is a biblical idea supported in Scripture.

God has a plan for everything, (Ephesians 1:11, Jeremiah 29:11 , Proverbs 16:9, Jeremiah 29:11-14, Proverbs 19:21, Ephesians 2:10, Jeremiah 1:5, Jeremiah 10:23, Proverbs 16:33), so of course God has a plan for who we marry.