The casino will list the countries that are restricted according to their licensor’s requirements. However, if gambling is prohibited in your country, it is your responsibility to verify that. It’s hard for the casino to gather a list of all countries where gambling is prohibited, so they usually add a clause like this one I quoted from BetPanda's Terms of Service:
It is up to you to ensure that you act in accordance with the laws of your home country or the country where You currently reside.
If you breach your country’s regulations, you may face more severe consequences than just having your account banned.
It's written in ToS and it's responsibility of users on what they do.
Practically, gambling is prohibited in many countries, Bitcoin and cryptocurrencies related activities are illegal or allegal in many nations, but people still do gambling or activities with Bitcoin and cryptocurrencies. When doing this, they are aware of illegal activities and must be affordable with any legal issue in future.
It's user responsibility, not responsibility of Betpanda.