Probably not, though it may likely be more influential in Germany. If Germany wins the war, they still do not have the clout to support a global cultural hegemony as the Anglophone world did IOTL.
Winning the war and thereby loosening up somewhat, Remarque is more accepted in Germany and doesn't have to flee. Therefore the international community doesn't welcome him with the same gusto (if it doesn't piss off Germany at the same time, who cares how good the book is?) Sure, people will read it, but since it doesn't give one a feeling of superiority to read it, the meta-narrative of the work is significantly duller.
Without the Anglophone nations flinging it around their middle schools, it just doesn't get as far.