How to open a bootstrap modal window from other component in Angular 8?

I have a bootstrap modal window that needs to open up on a button click, which is working fine. Now, I want to open that same modal window from a different component, I tried something but it isn't working, following is my code,

<section>
    <button type="button" class="btn btn-primary" (click)="openModal()">Sign In</button>
    
    <div id="signInModal" class="modal fade m-5" role="dialog"
        aria-labelledby="dialog-sizes-name2" data-backdrop="static">
        <div class="modal-dialog modal-md">
            <div class="modal-content">
                <div class="modal-header">
                    <h6 class="circularBold signUpHeading">Sign In</h6>
                    <button type="button" class="close" aria-label="Close" data-dismiss="modal">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    <form [formGroup]="signInForm">    
                            <div class="mt-4">
                                <button type="button" class="btn buttons nextBtn circularBold w-100" (click)="login()">Log in</button>
                                <p class="black2E circularBook mt-4 font-size12">Don't have an account?
                                    <a href="" class="circularMedium">Sign up</a>
                                </p>
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>
</section>

TS

  openModal() {
    $('#signInModal').modal('show');
  }

Code from other component

modalRef: BsModalRef;
 constructor(
    private modalService: BsModalService
  ) { }

   join(){
        this.modalRef = this.modalService.show(SigninComponent);
   }

Any help is much appreciated.

Thanks in advance!!

from How to open a bootstrap modal window from other component in Angular 8?