No, it hasn't, meaningfully.
> The last 10 years the extreme left in the US has shifted left, passing even the European left
Whether or not it's true, the “extreme left” in the US that may or may not have shifted that way is politically irrelevant.
Meanwhile, of the major parties the Democratic Party has been stable for decades while the Republican Party has shot to the extremes, a process that has continued at a rapid pace over the last decade.
https://www.economist.com/graphic-detail/2020/10/31/the-repu...
Biden can't pronounce the word "free healthcare" for fear of losing votes.
That's what I was contesting: far right is right at the centre of the political scene side by side with Trump, far left is not because it has no direct representation in the political system.
Unless you consider someone like Sanders a far left extremists, which is not.
Far left movements are mostly extra-parliamentary
I would like to add that the Critical Race Theory (where DEI originates from) is only recently starting to get traction in for example The Netherlands, traditionally an already pretty left-leaning country.
[1] https://assets.pewresearch.org/wp-content/uploads/sites/5/20...