Once again this shows the huge disconnect between the government authorities and the tech industry. Basic knowledge and a quick investigation would make clear that Mullvad is not storing any customer data.
There's also usually another disconnect: between tech industry publicity and tech industry reality. Mullvad could have been, and maybe even still is, lying about how they operate, because it's good for business.
List of the audits can be found here: https://mullvad.net/en/blog/tag/audits/