Guardicore interview questions

I was sent a home assignment for the python development team, which I was told should take 4-6 hours, and sent back a python script which I tested and fulfilled the assignment (both functionality-wise and efficiency wise). I was later reached out by the HR recruiter and was told that after assessing my code, they decided not to take me for the job. I asked to receive feedback as for what wasn't good enough, so I can improve for further assignments, and the recruiter agreed and said she'll talk to the team leader. I was kinda ghosted for about two weeks. When I reached out the recruiter again, she said the team leader is very busy, and therefore cannot elaborate why I didn't pass. I believe that if a company is asking a candidate to spend 4-6 hours on an assignment, the least they can do is to spend 15 minutes explaining why it didn't match their expectations, but maybe it's just me.

A 3 part process, first interview with team leader - asked me about my experience, current job, and main projects I did, explained about the role and asked me technical questions. second interview with team manager - basically a conversation to know each other, about the company, himself, the role I applied to, and sharing some stories third was HR