The point is that, as the BBC states,
“It has emerged that an archive of 30,000 emails, containing information about the former prince's controversial financial dealings, was given to the Lord Chamberlain, the most senior officer in the Royal Household, in 2020.”
The Palace responded by saying that as there is a police enquiry ongoing about AMW they - conveniently for them - can’t comment.
But the article goes on to say that,
“But a search of court documents has revealed that a large cache of emails relating to Mountbatten-Windsor's finances had already been sent to Palace officials, years before the current inquiries began.”
“The emails had been the subject of a legal dispute and documents from a High Court judgment in April 2021 show that a "copy of the archive" had been provided for the "Lord Chamberlain in May 2020".
“In June 2022, a subsequent High Court ruling refers to an email, dated 10 July 2020, saying the emails had been "delivered to Buckingham Palace".
Sorry but it is simply not possible to argue with any credibility that the head of the royal household, the Lord Chamberlain, kept that volume of documents concerning such serious, potentially criminal matters, away from the monarch and heir (s) and their closest advisors. To suggest such a thing is like saying that a CEO is not aware of what is happening in their own company. They obviously all knew! It’s simply ludicrous to suggest otherwise.