There's various ways of tracking support and by many metrics there are European countries that have given more than the US once you account for population & GDP. It gets more complicated for EU members as the EU has given financial support, so the largest funders of the EU, like France, have paid proportionally more via the EU than directly.

https://www.ifw-kiel.de/topics/war-against-ukraine/ukraine-s... https://www.usnews.com/news/best-countries/articles/these-co...

Also worth remembering that 70% of that aid from the US never left the US and was spent on procuring weapons from the US.

https://econofact.org/factbrief/does-most-u-s-aid-to-ukraine...