a lot of Asia is aware they need immigration to succeed,

While this is true, it doesn’t necessarily mean they’re open to it or that the immigration process is any easier for it.

as for Europe Spain is he most friendly to immigrants

I’ve heard that attitude is changing due to gentrification issues. Lots of remote workers have taken to the country and cost of living has apparently risen up in response.

I’m not entirely sure about either of these personally though(insight from people who live there would be wonderful), but I have heard about about the issues.