The providers that are restricted from your sign up country are usually watermarked (appears pale gray) in the section on Casino->Filter
https://fortunejack.com/faq/prohibited-territories
I can provide the list of restricted countries for our provider Pragmatic Play:
Australia, Bahamas, Bulgaria, Belgium, Cyprus, Canada-Ontario, Colombia, Denmark, France, Great Britain, Gibraltar, Greece, Hong Kong, Israel, Italy, Iran, Iraq, India, Lithuania, North Korea, Netherlands, Philippines, Portugal, Romania, Russia, Serbia, Spain, Sweden, Sudan, Syria, Singapore, South Africa, Syria, Turkey, Taiwan, UK, Ukraine, USA, UAE