There is still some region restricted can't choose in giveaways.
Bonaire/Sint Eustatius/Saba,Bouvet Island,Curaçao,Czechia,Federated States of Micronesia,United Kingdom of Great Britain and Northern Ireland Grenada,French Guiana,Heard Island and McDonald Islands,Sint Maarten (Dutch part),United States Minor Outlying Islands,Holy See

https://steamdb.info/sub/625030/