Michelle Yeoh has earned her award by working long and hard over many years in many roles. Jamie Lee Curtis has done the same. Ke Huy Quan has also worked long and hard in the industry. But the film is Stephanie Hsus' first major role.
Let me be clear. As a general rule (there have been exceptions) top-level Academy Awards given to performers are usually given on the basis of a long and distinguished career or, in the case of Brendan Fraser, or a bold step outisde their usual 'type'. The film they get the award for is just the excuse, the award is for the career.
There are no 'breakout' Oscars. If Ms Hsu wants one, she'll have to work for it!
On another point, All Quiet on the Western Front is almost universally acknowledged as one of the most powerful anti-war stories ever written. It also concerns the First World War, a war which took place before the Nazis existed, so it could hardly romanticise them. Do a little research before you write.