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: https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX%3A32012R1215. 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.
‘They’ (I.e. government agencies/PPP) actively exploit weaknesses or institutionally create them. Personal favorite is the backdoors built into TETRA, which is used for mainly government purposes (law enforcement, emergency services). ETSI acts as a strawman for government interest and serves no cause other than that of its masters. That bugs me to no end because this does not serve any purpose.
https://www.zetter-zeroday.com/interview-with-the-etsi-standards/