There really is no technical way to 100% prevent specific countries from using a given piece of software via the internet. Plenty of crypto platforms have claim

There really is no technical way to 100% prevent specific countries from using a given piece of software via the internet. Plenty of crypto platforms have claimed to ban US users (often with laughably weak techniques like IP block bans), only to be questioned by US authorities who basically say "OK, prove it (with KYC/AML)".