Yes, their campaign in Africa too. But compare that to 2/3 (or 4/5 depending on the source) [0] of total Nazi casualties that happened on the Eastern front and now it's not so much.
The assertion this thread is talking about is, "Europe and America made sure USSR won that war". How many casualties Europe and America took in the course of doing so is a separate question. The US and Britain had competent leaders and an advantageous strategic position, so they were able to make sure the USSR won the war at a cost of relatively few US and British casualties.
Helping isn't measured by numbers of killed Nazis. It was about massive material support of the USSR so it was able to fight the aggressor and kill so many Nazis. The West enabled that.
Here, from the bigshots from USSR:
"Khrushchev went further and admitted: “Several times I heard Stalin acknowledge [Lend-Lease] within the small circle of people around him. He said that . . . if we had had to deal with Germany one-to-one we would not have been able to cope because we lost so much of our country.”"
"Perhaps the last word should be left to Marshal Georgy Zhukov, who masterminded the Red Army victories. He admitted, in a bugged conversation in 1963, that without Lend-Lease the USSR “could not have continued the war”."