Twenty-five countries run more than one official entry portal
Across the registry, 25 countries operate more than one official government entry system, and two of them run three. Every one of those portals is genuine, which is what makes the question harder than it looks.
United States of America
Philippines
Japan
Canada
Sri Lanka
United Kingdom
Sierra Leone
Congo
Tanzania
Vietnam
Russia
Kenya
Kazakhstan
Malaysia
Malawi
Ghana
Thailand
Saudi Arabia
Cambodia
Haiti
South Africa
Morocco
Turkmenistan
European Union
Suriname
Jordan
Uganda
Chad
Syria
Egypt
India
Azerbaijan
China
Nepal
Eswatini
Benin
Laos
Hong Kong
Solomon Islands
Bahrain
United Arab Emirates
New Zealand
Brazil
Angola
Albania
Bolivia
Peru
Oman
Colombia
Northern Cyprus
Bangladesh
Papua New Guinea
Singapore
Cuba
Guinea
Indonesia
Nigeria
Australia
Venezuela
Cape Verde
Fiji
Mauritius
Taiwan
Qatar
Argentina
Ecuador
Bahamas
Israel
Namibia
Cameroon
Bhutan
Pakistan
Guernsey
Maldives
Seychelles
South Korea
Trinidad and Tobago
Senegal