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It's no longer supported Anyone how to get the Samsung Galaxy app store? : BlueStacks (reddit.com)
Rio de Janeiro, November 2nd 2021
If you have the Samsung Galaxy Store file you could just install in it.
I have the Galaxy Store version 22.214.171.124.... Mmmm... now that is the 126.96.36.199.
Not sure if that going to work since I go update automatic in the BlueStacks. But you could install Astro and see if it is able to extract Galaxy Store from a phone or tablet if you have one.
P.S.: The BlueStacks version that have the store was this one bellow;