The word "repent" is not even the bible as defined there..
There is a simple mistake here. If I take one word used in a culture and say that defines its meaning biblically I am missing the point.
"If anyone thoughtlessly takes an oath to do anything, whether good or evil (in any matter one might carelessly swear about) even though they are unaware of it, but then they learn of it and realize their guilt— when anyone becomes aware that they are guilty in any of these matters, they must confess in what way they have sinned. As a penalty for the sin they have committed, they must bring to the Lord a female lamb or goat from the flock as a sin offering; and the priest shall make atonement for them for their sin."
Lev 5:4-6
In this way the priest will make atonement for them before the Lord, and they will be forgiven for any of the things they did that made them guilty.
Lev 6:7
The term repentance or idea comes from an acknowledgement of guilt and an action that results.
In the law it was bringing the appropriate animal to be sacrificed.
For Nineveh it was sackcloth and ashes or David over his sin with Bathsheba.
In terms of bringing an issue we feel strongly about to the Lord, there is fasting. This is showing to the Lord this issue is important to us, and we want to focus on it.
Then Jacob tore his clothes, put on sackcloth and mourned for his son many days.
Gen 37:34
Then Joshua tore his clothes and fell facedown to the ground before the ark of the Lord, remaining there till evening. The elders of Israel did the same, and sprinkled dust on their heads.
Joshua 7:6
As old as Israel and christianity is, this has been a sign of distress, and calling to God.
Now you dishonour the sincerity of people and what simple words in these traditions mean. But that means nothing to you.
Because you have constructed as set of ideas that work and you will force the bible to support it.