I would like to note that there currently is no centralized Design System for the Dutch Government, unfortunately. All agencies are creating their own Design System based on the Rijkshuisstijl.
Currently I'm working on ROOS (https://rvo.nl/roos) which is the Design System for the Netherlands Enterprise Agency. This is build with the already mentioned NL Design System. My hope being that this will bring the different agencies together and start working on a centralized Design System for the Dutch Government and follow the excellent examples of https://design-system.service.gov.uk and https://designsystem.digital.gov/
Currently I'm working on ROOS (https://rvo.nl/roos) which is the Design System for the Netherlands Enterprise Agency. This is build with the already mentioned NL Design System. My hope being that this will bring the different agencies together and start working on a centralized Design System for the Dutch Government and follow the excellent examples of https://design-system.service.gov.uk and https://designsystem.digital.gov/