I bought a new galaxy tab 8 , and galaxy store not showing apps with an error message of app is not supported in your country
I live in Palestine
Country set as Israel
Same settings in my a71 and everything works well
@Husamjal: Where did you purchase your Galaxy Tab from? If the tablet was intended for use outside your current region then this can create compatibility issues with some apps and features due to software variances that exist in our products from country to country.