This game (Aniplex) has Kyubey-level selectivity, so I suggest, in order not to make a thousand posts on the topic where available, to summarize the approximate list AT THIS MOMENT.
But take this list with a grain of salt. If I made a mistake somewhere, write) Trust but check.
EXACTLY AVAILABLE (Available via VPN and/or there are messages confirming that it is available): Japan, USA, Netherlands, Norway, Poland, UK, Germany, France, Spain, Sweden, Canada, Australia, Italy, Philippines, Malaysia.
POSSIBLY AVAILABLE (Available via VPN, but did not see confirmation): possibly SEA (сan be accessed from the Thailand and Singapore region), Portugal.
MAY NOT BE AVAILABLE (Not available via VPN, but/or did not see confirmation): Cuba and maybe all Latin America, UAE, RSA, Iceland, Libya, Qatar, Dominican Republic.
NOT AVAILABLE (Not available via VPN and there are messages that confirm): Russia, CIS (definitely not available in Kazakhstan and not available through VPN of Uzbekistan), Ukraine, Estonia, Serbia, Montenegro, Finland, China/Hong Kong, Taiwan, South Korea, Vietnam, India, Greece, Czech Republic, Belgium, Ireland, Mexico, Turkey, Saudi Arabia, Puerto Rico, possibly all of SA (definitely Brazil, Argentina, Colombia, Chile, Venezuela, Peru), Algeria.
Draw your own conclusions)
UPD: Preliminary fully map of Aniplex love.
