How do you demonstrate ownership and drive something end to end?

"I got into the process through a referral, and from the start it felt way more structured and intense than other interviews I have done. It was an L6 AWS PM loop with a recruiter screen, an early hiring-manager conversation, and then a five-person loop where only one round was really about the role itself and the rest were mostly behavioral with a ton of digging. The biggest difference was that the first question was maybe 20% of it and the other 80% was them drilling into proof, metrics, tradeoffs, and whether I could steer the conversation without rambling. I did not get the offer, but the recruiter was actually really nice about it and said they were not closing the door and wanted to float me to a solutions architect path instead. It also felt team-specific in a way other companies are not, because one interviewer gave me a real problem they were actively trying to solve and wanted to see how I would think through it live."