And, no, it cannot confiscate the oil and, even if it would, most of the energy comes to Europe in the form of natural gas, which is moved by pipeline. So, yes, the US can stop that by bombing Austria or Poland.
It's obviously a bad place to be in, strategically, for Europe to be somewhat reliant on Russian fuels. But you should note that current sanctions are already far more costly for EU countries than for the US: https://www.ifw-kiel.de/fileadmin/_processed_/f/2/csm_mi2022...
For Latvia, it's 64x more expensive. Even for Germany, it's factor 10.
It’s always about choosing short term gain over long term thinking. Can’t wait to see when global warming really starts to hurt.
So even if they can’t go and grab the oil, they could force the issue: you buy this pretend-not-Russian oil, very well, next time someone pay you in dollars, we take a 75% cut.
But in the current climate, they would like to agree that ahead of time with Europeans who are right now dependant on Russia hydrocarbons for dear life.
Now that the world has witnessed them using the dollar as a weapon to deny other countries their sovereignity, they (China, India, Iran, Africa) will be working 24/7 to build an alternative payment system.
And a good day it will be too.
Have you heard of the Sprately islands?