Getting Error: Cannot find control with name:’ ‘ Angular while creating Dynamic Form using FormGroup

You need to move the form creation inside the subscribe method and wait for the response because it is an asynchronous call.

export class MaintenanceSurveyComponent implements OnInit {
    myFormTemplate: any = [];
    myFormGroup: FormGroup = new FormGroup({});

    @Input() public user;
    constructor(private maintenanceService: MaintenanceRequestService) {}

    ngOnInit() {
        this.myFormGroup = new FormGroup({});
        this.maintenanceService.getSurveyquestions(this.user).subscribe((res: any) => {
            this.myFormTemplate = JSON.parse(res);

            let group = {};
            this.myFormTemplate.forEach((input_template) => {
                group[input_template.hMy] = new FormControl({ value: input_template.hMy });
            });
            this.myFormGroup = new FormGroup(group);
        });
    }

    onSubmit() {
        alert('SUCCESS!! :-)\n\n' + JSON.stringify(this.myFormGroup.getRawValue(), null, 4));
        console.log(this.myFormGroup.getRawValue());
        console.log('this is test');
    }
}