That's a reason why many people don't provide it. However GutLab, in their handbook, states > the hiring manager should be prepared to let the candidate know

That's a reason why many people don't provide it. However GutLab, in their handbook, states > the hiring manager should be prepared to let the candidate know why they were declined if they had progressed to the team or manager interviews. https://about.gitlab.com/handbook/hiring/interviewing/#rejecting-candidates https://about.gitlab.com/handbook/hiring/interviewing/#rejec... In the case of the GP the interviewer apparently wasn't up to that. As I haven't interacted with them in any way I can't judge in any way further.