Frontline Data Solutions interview questions

Had 5 interviews - initial, meet with CEO, then 2 panel interviews, and final with CTO and CEO. The interview were average. the final interview was very strange. The CEO asked me to show confidential and protected information from work that I had done in other job, then didn't offer the position to me because I wouldn't share any of this confidential information.

3-Step Interview Process , One with Recruiting, One with CEO and One with Head of QA, Head Of Support and a Support Lead, each about an hour long. Interview are done over microsoft teams.