They haven't had to. Countries like India, which has straddled the line between East and West, were buying Russian oil at "friendly nation" prices, and selling it to Europe.
When Western leaders looked into putting a price cap on Russian oil, look at how many countries (including Japan) decided to ignore them, after Russia said it wouldn't sell to countries who enforced the price caps. Because the only way to enforce price controls like that is for countries to abide by them. Many didn't because they wanted the oil more.
They haven't had to. Countries like India, which has straddled the line between East and West, were buying Russian oil at "friendly nation" prices, and selling it to Europe.
When Western leaders looked into putting a price cap on Russian oil, look at how many countries (including Japan) decided to ignore them, after Russia said it wouldn't sell to countries who enforced the price caps. Because the only way to enforce price controls like that is for countries to abide by them. Many didn't because they wanted the oil more.