Moldova, like the United States, wants to end Transdniestria's existence as an independent sovereign state. To do so, it has begun an economic blockade by controlling Transdniestria's lifeline - all of its imports and exports.
The 1992 war, which Moldova started, has not ended officially: There is only a cease-fire, but not final settlement yet. By allowing Moldova to control all imports and imports and exports to and from Transdniestria, the war is being continued through economic pressure.
How would the world feel if the United States would not permit Cuba to import or to export anything without its customs documents being cleared first by the Americans?
From 1948 to 1949, West Berlin was cut off from land supplies. In response, the American military began a constant airlift to the Western-held sectors of Berlin.
Now, these same forces are supporting a similar "Berlin Blockade" against Transdniestria.
Illegal under international law
This economic blockade is unjustified and also illegal under international law, and it is not applied to States in similar situations
Taiwan - just like Transdniestria - is de facto independent. But internationally, Taiwan is generally considered part of China. As a de facto indepent state, even as one which is not recognized, Taiwan can freely export without China's permission. Likewise, all imports to Taiwan are processed by Taiwan, and not by China.
How would Europe feel if Taiwan was not allowed to export or import anything, except through China?