The Lancet and scientific integrity

At the same time the Lancet is not responding to various  PubPeer entries like one that I wrote some years ago. When talking to a senior editor at the REWARD conference in Berlin 2020 she said, the Lancet can’t do anything about  these “old stories” as experts and documents will be no more available.

Is there an expiry date of scientific integrity?

Or do we need any further documents?