I’m so confused. At least in tech all the big companies I work with are hiring in Poland because it is about the same as India after losses around fake hiring and the quality averages better.
It is absolutely a huge offshoring target at least for the US.
Everywhere is an offshoring target for US tech. Tons of US tech companies have Canadian offices because Canadian rates are far below US rates.
What exactly is confusing to you?
Anecdotes from your bubble inside one particular industry, that represents a small fraction of the economy of a nation, do not adequately explain the post soviet transformation of economies containing hundreds of millions of people. That's all.
Specifically I asked for evidence that current GDP growth is significantly driven by this specific type of foreign investment, as claimed. None has been forthcoming.