Possible to limit the countries an iOS application is released to?
In App Store Connect as of March 2021
1. Click your app dropdown
2. Click Pricing and Availability,
Under Availability click EDIT
you'll see
Yes, you can control which App Stores you app is sold in. This can be done in iTunes Connect.
First, choose your app from your App Dashboard. Next, look for "Rights and Pricing" in the top right corner.
Next, scroll down. You will see a link to sell in specific countries.
After clicking on that link, you will be able to select which stores your app is for sale in.