tryForAsyncIntoAsync.ts

this.applicationService.getApplicationTableData().subscribe(data => {
      const tempList = [];
      data.forEach((item, index) => {
        const countLink = item.applicationCount;
        this.applicationService.getApplicationCountData(countLink).subscribe(count => {
          tempList.push({
            key: (index + 1).toString(),
            linkUrl: item.linkUrl,
            applicationName: item.applicationName,
            // applicationCount: item.applicationCount,
            applicationCount: count,
            model: item.model,
            type: item.type,
          });
          if (index === data.length - 1) {
            this.applicationTableData = tempList;
            this.loadingForTable = true;
            this.loading = false;
          }
        });
      });

tryForAsyncIntoAsync2.ts

 let tempList = [];
      data.forEach((item, index) => {
        const countLink = item.linkUrl;
        // this.applicationService.getApplicationCountData(countLink).subscribe(count => {
        //   tempList.push({
        //     key: (index + 1).toString(),
        //     linkUrl: item.linkUrl,
        //     applicationName: item.applicationName,
        //     // applicationCount: item.applicationCount,
        //     applicationCount: count,
        //     model: item.model,
        //     type: item.type,
        //   });
        //   if (index === data.length - 1) {
        //     this.applicationTableData = tempList;
        //     this.loading = false;
        //   }
        // });
        tempList.push({
              key: (index + 1).toString(),
              linkUrl: item.linkUrl,
              applicationName: item.applicationName,
              // applicationCount: item.applicationCount,
              applicationCount: item.applicationCount,
              model: item.model,
              type: item.type,
            });