If you’re not getting enough feedback, DM someone this and see what happens:
Hi there! Would you mind giving me some feedback now that we’ve been working together for a while? Even just a couple bullet points would be great, with at least one being constructive. Thanks so much!
People usually feel rude giving negative feedback. But here, they’d be rude to not give negative feedback, because they’d be ignoring a request.
This has succeeded for me even when things like stay interviews and the two golden end-of-1-on-1 questions and anonymous feedback forms fail.