My Ex Accused Me Of Unlawful Sexual Acts, And It's Messing Up My Life

This is for all my lawyers and cops of reddit
Location: Kansas
Okay so back in 2021 my ex (F17) and I (M16) had broken up because she was emotionally and mentally abusive, and I had found someone else who had treated me better. Following our (very) messy breakup, my ex and her mom had spread SA rumors all around and it messed up my whole high school life. Now, 5 years later, I'm 21 and trying to go into law enforcement, but got denied for no specific reason. My fiance's dad has connections and found out that I have a sealed juvenile record, and now he and her mom are both questioning me when I had no idea why it was there.

I requested my records and discovered that my ex and her mom had filed a report for unlawful s*xual conduct, but within the report it is mentioned that the accusation was for verbal coercion, not physical in any sense, it all started when I was 15 and she was 16, and the messages that they claimed proved the coercion had shown no proof of coercion or anything of the sort. They ghosted the police afterwards, and the report was closed. No contact with me was made at any point during this.

For further context, the report was made 11/09/2021 for the committed date being 11/10/2026. I think my ex and her mom (she was very heavily involved in our relationship and swore her baby was perfect) were worried about backlash due to the start of our physical relationship being before I turned 16, the age of consent. Please let me know what I should do in order to allow me to move forward with my career of choice.

EDIT-- My question is how can I go around or expunge this sealed report from my otherwise clean record?