https://www.epo.org/en/service-support/faq/searching-patents/european-patent-register-and-federated-register/federated-4

How can I get direct access to national patent registers?

Country codes that are underlined and marked with an arrow in the Register are connected direct via deep linking to the corresponding national patent register record and legal status information.

For legal certainty in the national phase, always refer to the information in the national patent registers. Please note that deep links may not be available for every country. Read more on the EPO webpages under Data coverage.