It went from DIY open source to something more like the UK's model; in fact Canada is running with a number of UK-origin projects & ideas, like Notify, which is of course a good thing, we should all learn from each other's best practices and innovations.
There is:
Argentina - https://argob.github.io/poncho/
Australia - https://gold.designsystemau.org/
Canada - https://design.gccollab.ca/
Czech Republic - https://designsystem.gov.cz/#/
Estonia - https://brand.estonia.ee/?lang=en
Flanders - https://www.vlaanderen.be/digitaal-vlaanderen/onze-oplossing...
France - https://www.systeme-de-design.gouv.fr/
Germany - https://styleguide.bundesregierung.de/sg-de/
Greece - https://guide.services.gov.gr/
Italy - https://developers.italia.it/en/designers/
Netherlands - https://www.digitaleoverheid.nl/achtergrondartikelen/het-nl-...
New Zealand - https://www.digital.govt.nz/standards-and-guidance/design-an...
Singapore - https://www.designsystem.tech.gov.sg/
Switserland - https://swiss.github.io/styleguide/en/
United States - https://designsystem.digital.gov/
Ukraine - https://diia-en.fedoriv.com/