If the bullying was true, then why did the palace hide the findings of their own report on it?
Everyone tries to read too much into this. It’s just because all the information about every employee, and Meghan and Harry themselves, contained in the report is personal data and private and can’t be disclosed without any of their consent.
HR investigations are always strictly confidential and not released to the public (you are really limited in what you can say about outcomes internally, too). This only changes when things escalate to the Employment Tribunal.