Americans have to file taxes with the IRS regardless of who is paying them and where the company is based. There are tax breaks available (on taxes owed to the US) if you are living and paying taxes in europe to avoid double taxation for the most part. It makes the paperwork a little more tricky but it’s still done frequently and isn’t “very unlikely.” The most difficult part isn’t your american taxes it’s making sure you’re paying taxes correctly in your new country. It will make it easier if you work for a multinational company (like Schneider Electric USA, for example) where they already know the ins and outs of taxation in both countries, but I’ve known people to do this out of smaller companies as well.

You could also consider working an american job remotely in Europe

Doesn’t the US’s geography rule it out as an efficient source of ‘energy products’ for europe?

It might be a good time to check for local food co-ops in your area. Usually these arrange for you to order items directly from local farms and pick up from someone in your neighborhood. Some of them are produce only but some offer local dairy and meat and even baked goods too. Do some digging (ask on nextdoor?) if you can’t find one because sometimes they’re quite small. In college I used one that accepted EBT!