One of the biggest inequalities being that Black Friday and Cyber Monday are American inventions aligned with a holiday that doesn’t exist in other countries.
I'm in South-East Asia/Japan and Black Friday/Cyber Monday is definitely a thing here, but Shopify isn't as prevelant here. All major eComm players are running BFCM campaigns.
Black Friday seems to be pretty widespread: many German retailers like https://www.galeria.de/ or https://www.mueller.de/ advertise "Black Shopping" today, and it seems common enough in the UK as well.
Heck, some British retailers are even co-opting the 4th of July as a sales holiday for local businesses: "Independents' Day."
Never underestimate the inexorable march of capitalism.