I’m sure you have better data but here is what Wikipedia says:
In 2023, resident foreigners made up 26.3% of Switzerland's population.[18] Most of these (83%) were from European countries. Italy provided the largest single group of foreigners, accounting for 14.7% of total foreign population, followed closely by Germany (14.0%), Portugal (11.7%), France (6.6%), Kosovo (5.1%), Spain (3.9%), Turkey (3.1%), North Macedonia (3.1%), Serbia (2.8%), Austria (2.0%), United Kingdom (1.9%), Bosnia and Herzegovina (1.3%) and Croatia (1.3%). Immigrants from Sri Lanka (1.3%), most of them former Tamil refugees, were the largest group of Asian origin (7.9%).
That’s a bit different than what you seem to be implying - according to Wikipedia the immigrant population of Switzerland is just Europeans, mostly Western Europeans at that.
With respect to Switzerland, what are the immigration rules and polices if you are Indian, or Chinese, or Brazilian, or Indonesian, or Nigerian? I’m just picking on those countries due to a mix of population levels and relevance to immigration in America. It’s rather surprising to me that Switzerland seems to have little meaningful numbers of immigrants from these higher population countries. Why is that? Is there maybe a specific policy we could point to? Do people from Italy really like the Alps and the Chinese don’t?
And going back I think to what is implied by the person I responded to, if what they’re saying is true about the economic value of immigration, and I think it is, why doesn’t Switzerland have, for example, unrestricted immigration from all over the world? Why are half of its immigrants from Italy alone? (Again just going off the Wikipedia article and I am happy to look at any other figures)
Are they immigrants or just Italians living and working in Switzerland because of the EU?