Talking about benefits, I would say war never brings benefits.
War always brings destruction to both sides. And if I say who benefited from this war then I would say Russia. moreover, in all other fields, all the countries of the world are facing economic crisis. I think this situation is due to the introduction of various restrictions on oil and gas.
I am not an expert but I assume there have been companies that own weapons and ammunition factories around Europe, USA or even in China which probably are having a good time since this invasion started against the Ukrainian people, after all, there are already rumors and informs from the USA-Ukranian side that they are running low in ammo which only means that manufacturers will get more money to increase their production and the owners of such factories can pocket a good money our of this situation.
They may not even be interested in the specific situation of the war, but like the extra work they are getting to do for both factions.

The idea is absolutely correct, but there are nuances. There are two of them:
1. Conscience
2. Sanctions

Conscience is about what can and should be supplied to those who are weak, and sweat turned out to be a blow of terror.
Sanctions are about the fact that not everyone who wants and can actually trade "for any side" ...
A good example is Egypt. The country has historically always been "under the supervision of the USSR / Russia." The year 2022 came, the "second army of the world" began to shamefully lose and began to beg Egypt to start producing and supplying weapons to Russia. Egypt is smart, and understands how it will all end, and then to be in the "dock" as an accomplice of international terrorism - did not want to, which is logical! And Egypt agreed to start producing weapons for..Ukraine!

For which the people and the government of Egypt are very grateful and respected!