[mrbadger]

Your apparent implication that the EU is coercive is false. Very simply, if you want to do business in the EU you have to comply with the mandated market standards. No hammers are involved.

The EU is the greatest peace project in history not, as many (including Donald Trump and many right wing libertarians eg) characterize it, as an oppressive entity. It's why countries are keen to join it and to adopt common (shared) EU standards. It's simply better than having multiple competing national standards.

Market power and diplomatic power are different. No EU diplomacy whatever was involved in the UK's sovereign decision on the UKCA mark or USB C and related matters. The EU does have diplomatic representation in London and uses it to, e.g., let the British govt know it will face trade sanctions if they violate the terms of the UK Withdrawal Agreement (threats to break international law were made repeatedly by the last UK govt).