SoftBank only bought ARM in 2016, they are by origin very much from the UK and I don't think anyone is going to argue that ARM wasn't relevant before 2016.

DeepMind was also founded in the UK and later bought by Google. Their HQ remains in London.

DeepL, who are providing a much better translation product than Google or Microsoft by many accounts, are a German company.

Spotify, which I'm sure needs no explanation, is a Swedish company.

While it is certainly true that the US pays better, I think you need to re-evaluate your position that noone else is creating good or valuable products.

I can't speak to the job market in the UK, but in Germany there doesn't seem to be a great difference based on anecdotal evidence from friends. There's absolutely a chance this is incorrect as well, because discussing wages is still somewhat against societal norms here (which is stupid in my opinion).