I cant use ecg in my region

ECG is

viewed as a medical device which mean it require official approval from the

government of a country before it's legal for apple to offer

these are the countries which has provided with said approval so far

watchOS - Feature Availability - Apple

ECG

implies that citizens' medical data be stored by a foreign third-party company

without individual approval by the government of said country, and that is not

something all countries feel comfortable with.

And;

For the ECG app to work on your watch the ECG app has to be approved by;

A. the government of the country in which the watch was bought and

B.the government of the country in which you reside.