
Microsoft's policies for phone number support in account registration and security verification may vary by country or region. Some countries may have limited or restricted support for adding phone numbers to Microsoft accounts due to regional regulations, telecommunications agreements, or other factors. Based on the screenshot that you've shared, it's possible that Pakistan is in that list as well. If you're experiencing difficulty adding your phone number to your Microsoft account in Pakistan and receiving a message that the country code is not supported, you can also try Alternative Verification Methods. Some of these alternative solutions include email verification, security questions, authentication app, security keys etc. Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.