How to send multiple api requests in a loop in angular?

Question

Angular

I want to make several api requests through a loop. But outputs only 1 request correctly. There are more of them. Please tell me how to solve this problem

for(let i = 0; i < Object.keys(response).length ; i++){
     
          return this.facebookService.getDataOfAds(response[i][2])
         .toPromise().then(response => {
           
          this.data = this.ls.addItem(response,this.varGroup);
         
         })
         .catch((err:any) => {
            console.log(err);
         }); 
      }