Is it honestly true that Biden-Harris would be 'right wing' in Europe? (Which part of Europe?)
Because what I find is that many Americans tend to exaggerate how 'right wing' American politics is. Some even say that Bernie would be a moderate in other Western countries - except people from the UK and Australia have reminded them that Bernie isn't considered a moderate in those countries either. In fact, Bernie is effectively outside the Overton Window in Australia, being to the left of the most left-wing party in the Australian parliament (although he would fit into the left wing of British Labour, the UK being to the left of Australia overall).
I think Biden-Harris certainly wouldn't be welcomed in the Australian or Canadian Right, for example. Harris, in particular, probably wouldn't even fit in the British Right.