Here’s RT reporting on it: https://www.rt.com/russia/581155-duda-ukraine-lives-cheap/

Here’s The Washington Post “reporting”: https://www.washingtonpost.com/opinions/2023/08/10/poland-president-duda-ukraine-interview/

It’s worth noting the US is promoting this narrative too: https://cepa.org/article/its-costing-peanuts-for-the-us-to-defeat-russia/

https://www.aei.org/op-eds/polands-president-says-america-and-poland-must-stop-russian-imperialism/

I can’t find the link I originally read but I found the quote here

”It is very simple,” Polish President Andrzej Duda told me last week. “Right now, Russian imperialism can be stopped cheaply, because American soldiers are not dying.” But if we don’t put a halt to Russian aggression now, “there will be a very high price to be paid.”