There is also this FD (Financial newspaper) article that covers the press conference:

DNB: financiële sector moet binnen vijf jaar minder afhankelijk zijn van VS
(link to archived version: https://archive.is/FsnM7)

It doesn’t say that much more than the NOS article, but here is their summary (translated by Deepl):

In brief

• DNB warns of the risks associated with dependence on American IT service providers.
• The regulator wants financial institutions to take responsibility.
• Flexible contracts and joint procurement, among other measures, should help to reduce dependence.