I know, I live in one that doesn’t. However no European county uses USD. So we are much more familiar with seeing Euros as a European benchmark than USD.
Also worth noting, EU is a subset of Europe. London isn’t in the EU but is in Europe.
It is but that isn’t the point. You wouldn’t show the wages in any other unrelated currency, like Dogecoin, and say “but the exchange rate is basically equal”.
If you’re measuring European financial assets then they should be represented in a European currency (and if you want to show USD then have that as an additional field or afterwards in brackets).
Everyone in Europe but not the Eurozone knows the rough exchange rate between their local currency and the Euro. We see prices in Euros on many foreign trips, and for some online purchases.
Also worth noting, EU is a subset of Europe. London isn’t in the EU but is in Europe.