Yes, you can get not only the 2020 stimulus, but also claim the original stimulus IF you file “married filing separately” for 2020 a few weeks from now when the forms are out. Claim your stimulus on Line 30. Just make sure your about-to-be ex does NOT file a joint return with your SS#.
Read this article.
You qualify if your own income is under %75,000.
But also check with your divorce attorney for any other implications this might have for your divorce proceedings.