How do I see which keywords are working well in specific/different regions for my site?

You can set up a custom Google Analytics account or even use one of the existing reports to find this out. The bad news is that 80 to 90 percent of the keyword phrases nowadays are hidden so you won’t be able to tell what keyword phrase they used to visit what page.

Google Search Console is another option that you can use but it doesn’t show what page they come from.

If you use a program like SEMRush or Ahrefs you can get emailed automatically with fresh keywords you started ranking for and where. Plus get optimization tricks to rank even better.