Aurora Innovation Software Engineer I interview questions

I had a call with the recruiter, then a technical discussion with the hiring manager. There was no coding involved, we just discussed my experience. Then I had a technical round (Data Structures/Algorithms style coding question), it wasn't too hard. Then I had four rounds of virtual onsite: the first was a behavioral interview with the hiring manager, the second was a technical interview where we discussed snippets of Python code, the third was systems design, and the last one was a Leetcode-style question in JavaScript. They told me the main goal of the coding interviews are to have a productive discussion about the code, that is more important than solving the problem. Overall the interview questions were not hard at all.

The hiring manager reached out and asked for basic information about background, visa status etc. When I said I need visa sponsorship he says he needs to double check. Get back to me a few days later saying they don't sponsor