I’m not familiar with psychology with an emphasis on international relations. Is she interested in a double major with psychology and international relations? Or a major in political science with a focus on international relations?
You will want to look at the foreign language requirements for colleges. Most colleges want at least two years of the same foreign language, and many/most of the colleges that are more selective prefer students to have three or four years of the same foreign language. Additionally, if your D is interested in international relations, foreign language proficiency is important to have. I would strongly urge her to take French II or the next level of German (German III?).
When you’re looking at what colleges want, note whether they say recommend or require. If it’s required, then your D may be out of luck. If it’s recommended, then she may have a shot.
Look at what each college requires, but usually schools that ask for more than one letter of recommendation want one from a humanities/social sciences teacher (English, history, foreign language) and one from a STEM teacher (i.e. math, science). The preference is also usually for teachers who have taught the student in 11th or 12th grade.
There are many ways to get internships for NGOs or international experience without being in NYC, D.C., or Boston. Many state capitals have international/foreign trade boards or committees to recruit foreign investment or tourism in the state. They may have NGOs that help with refugee resettlement or asylum claims or other issues. Additionally, your D will have summers to focus on internships as well, so though there can be a special look into the cities you mentioned, I don’t think the search should be limited to them.
Has your daughter visited any schools yet? What are her thoughts about school size? Greek life? The importance of intercollegiate athletic enthusiasm? Does she prefer small classes or the anonymity provided by larger lectures? Are there any other factors that influence her college preferences?