Meta Project Manager interview questions

Recruiter contacted me via LinkedIn and set up a call. First call was straightforward and I progressed to next round for Product Sense and Execution interviews which were back to back via zoom. It took the recruiter just under a week to get back to me after that. I didn't receive an offer, and Meta refuse to give feedback. Whilst the experience was ok, it was a complete waste of my time as they didn't give me any idea on what I should work on for subsequent job applications. This has put me off from applying to Meta in future, or bothering with their recruiters should one of them get in touch with me again.