but what does it do for the US?

Nothing really, but it makes it look like Trump is doing something. And he also makes Russia look good, which Trump likes too.
The reality however is that Russia doesn’t even have enough diesel themselves, they have to buy reined dieself from China and India and still they have a serious shortage, so diesel prices in Russia are record high, and many farmers haven’t been able to get the harvest done.

So this Diesel from Russia, is in reality from China or India, the shipped from Russia to USA if that ever actually happens.
But USA is a net exporter themselves, so chances are that it will then be shipped to a fourth country.

Completely moronic all the way through, and nothing more than at most a PR stunt, and probably only 1% of people know how stupid it really is!

The energy ceasefire is a good idea and would save the Ukrainian people a lot of suffering and death.

Ukraine has suggested this for years. But Putin has refused all suggestions of an energy ceasefire.