IPA was significantly revived by west coast US brewers and basically wasn't drunk in the UK at the time it caught on in the US. The modern "craft" (under that name) and explosion of styles and experimentation was very much an American cultural export. Europeans have brewed a lot of styles in regional breweries since forever, but the creative explosion of the last few decades happened in the US.

Comment significantly changed since I replied, so adding:

Actually the original American beers did have a lot of impact. American Adjunct Lagers are brewed in a lot of countries:

https://www.beeradvocate.com/beer/styles/38/

I don't like them, but they've certainly had a major influence on world beer. Most of the world's 10 most popular beer brands are American Adjunct Lager.