Enterprise Knowledge interview questions

I met with a recruiter for a 30-minute introductory call. I had already spoken to people at the firm, including the CEO, so this was the first step in the formal interview process. The call went well, and I was told I would hear back in a week about the next steps. I was then essentially ghosted - communication with the recruiter ceased. I saw the CEO a few weeks after and he asked how the interview process was coming along... ??

I had an initial HR screening, two interviews with employees, a panel interview, including preparing a draft document and a presentation, and finally an interview with the CEO. It was a lengthy and very time-consuming interview process. After the final interview, the recruiter never followed up and I never heard from them again.