Ziyoda Yakhshibayeva, 45, an ethnic Kyrgyz living in northern Tajikistan, has not seen her son and daughter-in-law for two years. They live in the capital of Kyrgyzstan, Bishkek, and getting there has become difficult for Yakhshibayeva. The predicament is the product of border tensions. Following a bout of fighting in the spring of 2021, both governments all but shuttered overland frontier crossings, instantly killing petty trade and causing heartache for families. There are countless thousands in Yakhshibayeva’s situation. A mounting number of ethnic Kyrgyz people are looking to leave Tajikis…