Angular 9 Bootstrap carousel remains still with no effects - html

Question

In HTML, all is properly ranged and directly equal to the original Bootstrap 4 website:
<div id="carouselExampleSlidesOnly" class="carousel slide" data-ride="carousel">
<div class="carousel-inner">
<div class="carousel-item active">
<img class="d-block w-100" src="../../assets/images/background/promo-bg.jpg" alt="Primera diapositiva">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="../../assets/images/background/promo-bg-2.jpg" alt="Segunda diapositiva">
</div>
<div class="carousel-item">
<img class="d-block w-100" src="../../assets/images/background/promo-bg-3.jpg" alt="Tercera diapositiva">
</div>
</div>
</div>
styles.css:
/* You can add global styles to this file, and also import other style files */
#import '../node_modules/bootstrap/dist/css/bootstrap.min.css';
/*#import '../node_modules/bootswatch/dist/yeti/bootstrap.min.css';*/
#import '../node_modules/font-awesome/css/font-awesome.min.css';
#import '../node_modules/alertifyjs/build/css/alertify.min.css';
#import '../node_modules/alertifyjs/build/css/themes/bootstrap.min.css';
#import '../node_modules/ngx-bootstrap/datepicker/bs-datepicker.css';
/*Los imports del tema importado*/
#import '../src/assets/css/theme-1.css';
/*#import '../src/assets/fontawesome/js/all.js';*/
#import '../src/assets/plugins/pe-icon-7-stroke/css/pe-icon-7-stroke.css';
#import '../src/assets/plugins/flexslider/flexslider.css';
The carousel in the HTML page stays still, and I don't get why. All the needed code is already included in the components of the Angular. I took the carrousel from https://getbootstrap.com/docs/4.0/components/carousel/
But still, it does not work.
I edit to add the Js calls at the end of home.component.html:
Of course. At the end of the home.component.html there is this code: <!--
jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</div>