I am not sure how things work in US but, living in an Eastern European country, I can say that salaries started growing, almost reaching western european levels, after which many foreign companies closed offices and moved to cheaper countries like India and Pakistan.
Where in Eastern Europe? At least from my perspective (I've done hiring at several companies, albeit just hiring individual remote workers rather than open a local office) developers in Poland and Czechia are still very competitively priced (less expensive than north/western Europe and A LOT less expensive than the US).
That's pretty weird. Usually, less companies mean less demand for labor. If supply is the same, that means price-for-labor (salaries) would go down. Unless, this was accompanied by people leaving (reduction in supply). Do you have an explanation for this?
It's a pretty common place to get outsourced devs from. But it doesn't have the conglomerate offices like India, so you have to do more to get a team from there. The people are basically the same so same level education, same-ish salaries, same English understanding, etc.