How to send an array of MultipartFile from Angular to Spring Boot

Question

The issue is that my data structure is not the same in Spring Boot compared to the data in angular. I am probably just missing something silly. Thanks in advance for the help.

Angular Data to Send

My angular service method looks like this

submit(selectedfiles:FileList[]) {
    const formData: FormData=new FormData();
    for(let i=0;i<selectedfiles.length;i++){
      for(let j=0;j<selectedfiles[i].length;j++){
        formData.append('selectedfiles', selectedfiles[i][j]);
      }
    }
    return this.http.post<any>(`${this.baseUrl}/abc/submit123`,formData);
  }

Spring boot controller method looks like this

@PostMapping("/submit123")
public ResponseEntity<ResponseVO> submitApplication(@RequestParam("selectedfiles") List<MultipartFile[]> multifile) throws Exception {
    try {
        Boolean res = blah.submit123(multifile);
        return new ResponseEntity<>(new ResponseVO(res), HttpStatus.OK);
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        return new ResponseEntity<>(new ResponseVO(e.getMessage());
    }
}

For the controller I have tried the below but everything returns the same result(a flatted list)

Spring Boot Data Result

@RequestParam("selectedfiles") List<MultipartFile[]> multifile

@RequestParam("selectedfiles") MultipartFile[] multifile

@RequestParam("selectedfiles") MultipartFile[][] multifile