Ukraine has a lot of natural resources. Any place that has a large salt sea, and hot springs tends to be a mineral store house. And Ukraine has that in abundance as do the United States. We have the state of Nevada and Utah.
They also have oil and natural gas.
Insofar as "wealth of nations" agricultural production is true wealth. They have a nice climate, plenty of fresh water, and they can grow crops kind of like California does in the central valley. Even without the natural mineral resources they would have a lot.
They are a lot like California plus Nevada. Very comparable.
They also have have Steel like Michigan does with their motor city infrastructure. Russia is trying to steal that part.
They have a lot of economic potential. They were the major production center for the Soviet Union. By comparison Russia is kind of poor.