What possible feedback are people looking for after an interview, though? I've done 100s of interviews throughout my time at FAANGs. The bulk of the feedback generated is just low-value snap judgements made by people who really don't want to be there. It's a dice roll. You either land in a loop that (a) has more people that like you rather than dislike you, and (b) asks questions you know how to answer, and, by far most importantly, that you answer in the way that lines up with their biases, or you're dropped as an incompetent rube.

One of my coworkers at Amazon was leaving for greener pastures. Before she left, for the lols she showed me the feedback she left when she interviewed me. It was something absolutely brutal along the lines of "doesn't appear to be able to code at all" (I was offended upon seeing this "feedback"!). My point being: interviewing is stupid, and, generally speaking, there is no valuable feedback to be had from the process.