Luma Health interview questions

I completed the screening (performed by Hiring Manager), interview with the Hiring Manager, interview with the Head of Product, and assignment/panel interview. After the fourth and final stage, I received a generic rejection email from a no reply address with no feedback provided.

I had 4 interviews : a quick screening interview with the HR recruiting team, a one on one interview with my future manager, then a panel interview with a trial lesson with four members of the company, then a one on one interview with the VP of Engineering.