While tens of thousands of people have joined Facebook groups in Sweden and Denmark calling for no longer buying American, Norwegian company Haltbakk Bunkers has announced that it will stop supplying US military vessels with fuel.
It's not terrible, but not a proper substitute. All the niche communities are very much dead. On the other hand you have an overload of leftist politics, linux, and gaming. Nothing inherently wrong with those either, but I'm missing a fair balance.
I use the 'No Thanks' app, but only as a starting point to then confirm if what they say it's true. I don't like that it's closed source, but at least it's an option. Also, I should note that some brands are ethical in some countries or states, but not globally, so you should check local resources for better results 🧐