Colours:

Countries that have headquarters of particular churches:
Country       Church(es)

Ukraine       Ukrainian Greek Catholic Church, Ruthenian Greek Catholic Church (historical)
Romania       Romanian Greek Catholic Church
USA       Ruthenian Greek Catholic Church (present day)
Hungary       Hungarian Greek Catholic Church
Slovakia       Slovak Greek Catholic Church
Italy       Italo-Albanian Catholic Church
Croatia       Greek Catholic Church of Croatia and Serbia
Serbia       Greek Catholic Church of Croatia and Serbia
Greece       Greek Byzantine Catholic Church
North Macedonia       Macedonian Greek Catholic Church
Bulgaria       Bulgarian Greek Catholic Church
Belarus       Belarusian Greek Catholic Church
Albania       Albanian Greek Catholic Church
Russia       Russian Greek Catholic Church
Egypt       Coptic Catholic Church
Eritrea       Eritrean Catholic Church
Ethiopia       Ethiopian Catholic Church
Armenia       Armenian Catholic Church (historical)
India       Syro-Malabar Catholic Church, Syro-Malankara Catholic Church
Lebanon       Maronite Church, Armenian Catholic Church (present day)
Syria       Melkite Greek Catholic Church, Syriac Catholic Church
Iraq       Chaldean Catholic Church

Other countries covered by Eastern Catholic circumscriptions:
Angola, Argentina, Australia, Austria, Belgium, Benin, Bosnia and Herzegovina, Brazil, Burkina Faso, Cameroon, Canada, Central African Republic, Chad, China, Colombia, Congo-Brazzaville, Congo-Kinshasa, Ivory Coast, Cyprus, Czechia, Denmark, England, Equatorial Guinea, Estonia, France, Finland, Gabon, Gambia, Georgia, Germany, Ghana, Guinea-Bissau, Guinea, Iran, Israel, Jordan, Kazakhstan, Kosovo, Kuwait, Kyrgyzstan, Latvia, Liberia, Lithuania, Luxembourg, Mali, Mauritania, Mexico, Moldova, Netherlands, New Zealand, Niger, Nigeria, Norway, Palestine, Poland, Scotland, Senegal, Sierra Leone, Slovenia, South Sudan, Sudan, Sweden, Switzerland, Tajikistan, Togo, Turkiye, Turkmenistan, Uruguay, Uzbekistan, Venezuela, Wales