Well if I'm in your shoes I'll try creating a new account and if thesame restrictions occurs it shows that it's not a bug but an intentional decision from the game provider.
I wouldn’t recommend doing such thing because instead of being restricted by just a single provider, you could get accused of multi-accounting and have your account banned.
Some users may also suggest using a VPN to bypass the restriction, but I would avoid doing that too, at least not until I get confirmation from support that it wouldn’t cause any issues.
Game providers have their own rules and their own lists of restricted countries, which get updated regularly, so there’s nothing weird here, imo.