That’s a valid point and relates to a nation’s sovereignty. If they don’t recognise an EU legislation, it will be difficult. That’s why overarching legal frameworks exist to allow one country to enforce court decisions in another country. The EU uses this: eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX…. Other countries have treaties.
In other cases, if no treaty exists it could require starting legal proceedings in the country where the company resides. For instance, Australia. And through local arbitration enforce a court decision, based on the legal framework of the country of residence. It needs no explanation this is expensive and time consuming.
I’m not a lawyer and not sure if a EU-Australia treaty exists but wouldn’t be surprised. It’s more complex than just having or not having a treaty.