Have other countries or states acknowledged the Armenian Genocide?

Yes, many.

Countries and governmental bodies that have officially recognized the Armenian Genocide include:

Argentina, Austria, Belgium, Canada, Cyprus, France, Germany, Greece, Italy, Lebanon, Lithuania, the Netherlands, Poland, Russia, Slovakia, Sweden, Switzerland, Uruguay, Vatican City, Venezuela, the Council of Europe, the European Parliament, and the United Nations Sub-Commission on Prevention of Discrimination and Protection of Minorities.

Additionally, forty U.S. states have acknowledged the Armenian Genocide.