I know that a few years ago, a new Corvette with a US price tag of $55k sold for $85k equivalent in Europe.
A VW Golf that sells for $20k in the US has a UK price equivalent of $26k.
If the EU is adding more in tariffs and the VAT to the cost of US cars exported to Europe than the US adds to Euro cars imported into the US, then that might be a good one for Trump and his spokesmen to point out to the American people.
I think the number of examples available for use is immense.
And some nations use non-tariff barriers specifically designed to disqualify products from other nations from importation.