You can here https://fairspin.io/apb under section 1.8 the list of countries that is restricted to access the casino. It's odd that I can't copy the text on the ToS to share it here directly so just post the direct link for it.

In regards to the mirror link. I don't see any info in the casino regarding this. Be cautious on using mirror link provided by other user unless you can verify that its legit.