China exports to US because US buys stuff from the China. China's efforts to find new trade partners has hampered the fact that EU and co have also put tariffs for Chinese goods.
But those markets that I mentioned are accessible and EU already is in in talks with them and alternatives for US trade should already exists more, but EU's US buddies segment has has slowed down the progress past decade, because they think that USA is our friend.
you need functional supply chains - supply chains exits with the countries that I mentioned
you need a trade agreement - there are existing trade agreements with the countries that I mentioned, but these trade agreements should be made better, comparable to one that EU has had with the USA.
you need a country that can buy your goods and can absorb what the US buys - these countries need to only partially absorb the things that US buys, because big sunk of the goods that USA buys from Europe does not have alternatives and USA can't produce them itself, so regardless of how trade war goes USA companies needs to buy those goods from Europe or go out of the business. So even worst trade war can't really remove big sunk of the trade.
All the things I mentioned were things that EU's commission itself offered as options, but they decided against them because many factors, from which majority has nothing to do with the trade. It is same factors why EU don't do anything to prevent Israel starving population of Gaza, even though it is something that EU by its own laws should be against.