The trend is unfortunately active a lot further afield than just Europe or the USA. Similar recent spikes in political polarisation are showing up everywhere. Everywhere that there's been free social media for the past ~20 years, that is.
Whether it's Australia : Pauline Hanson, an anti-immigration nationalist widely lampooned as a walking faux-pas for the past two decades, now virtually leads the polls with her One Nation party, which has gone from about 5% support (when the current center-left government was elected mid-2025) to over 25%! today. In the space of 17 months.
New Zealand : From the globally-lauded center-left Jacinda Ardern, at home she was soon all-but-bullied out of politics by a significant and very vocal portion of NZ males angry at her shortcomings - she lives in Australia now - and NZ has since been led by a coalition of three increasingly-right-wing businessmen doing their best to "crack down" on the poorer classes to "balance the books".
Brazil : The big swing from Bolsonaro on the right to Lula on the left.
Japan : Increasingly fragmented, moving rightward and nationalist, centrist rule threatened for the first time since 1955.
Argentina : The populist president Milei, whose strategy-of-least-thought - rip off the whole bandage, right now - proudly sacrifices the hopes of a generation-or-three to gain a form of Economic Satisfaction post-haste.