[email removed] Fadi, you get spoon-fed an answer that saves your bacon and you get upset? Chill out. If you can make a call to the RestAPI endpoints, you can make a GraphQL call. And as Alex and I told you, with ONE call you can get 250 products AND their metafields.
So move on, write your code and be happy someone filled you in and gave you free correct advice. It is common courtesy to be gracious and not defensive, as if I did something to offend you.