For example, I used to work for a big company in Denmark that has a sattelite office in Bucharest.
It is questionable to see that even the equipment the developers get there was subpar. The fulltimers there were treated as contractors (e.g.: no career incentives), expendable (high turnover).
The office just existed because when the company was smaller and needed more than now cheaper labor, they made it so that remote managers could be there as a proxy.
Joke aside, what you said above also applied in my case to my ex German employer in Eastern Europe. We got cheap machines with half the specs of the German counterparts but the management in The Mother Land expected the same productivity as the German colleagues.
Now, having migrated West to Austria(similar culture to Germany) tings don't get better an all accounts, even if you speak German. Sure, now you get nicer machines, and even if you manage to negotiate a salary close to local levels, your career development opportunities are close to zero as management will only propose the locals for promotions and trainings as those are the guys managers spend their lunches and cigarette breaks with, even if they're mildly incompetent. You'll be left as that guy who just needs to sit as his desk, do what he's told and be grateful to his masters he's been given a job as if you're coming form a country of goat hearders.
This horrible discriminatory culture in EU countries is not something the EU can't fix unfortunately and it's one of the reasons countries like Germany or the EU as a whole will never catch up to the US on innovation or salaries in tech.
I am not in a stage of life for pursuing promotions to give more anedata on that, but I can see that a lot of senior managers here in Denmark are not immigrants. I do see however that there is a wave of immigrant founders here. Let’s see if the economic environment will perdure long enough to see a greater change.