If another app review is needed when I change 'Country or Region Availability' in App Store Connect?

I want to add more countries at 'Country or Region' menu, but I want to know in advance, if another app reivew submission is required.

If I add more countries and save the option at App Store Connect, will my app automatically be exposed to added countries? Or do I have to request another App Review?

+) If I have to submit App Review for changing 'Country or Region', will it be ok to upload same app build?

If another app review is needed when I change 'Country or Region Availability' in App Store Connect?
 
 
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