Bootstrap 5 Video Carousel Missing "Next" or ">" Buttons?

I'm trying to create a video carousel in Bootstrap 5 by using this example from w3schools and substituting the images with links to some online Facebook videos.

Seems to work ok, except the "next" or ">" icon to manually scroll to the next video doesn't show on any of the videos. While the "previous" or "<" icon appears on all 3 videos in the carousel. Any ideas why?

My code is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap Example</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
</head>
<body>

<!-- Carousel -->
<div id="demo" class="carousel slide" data-bs-ride="carousel">

  <!-- Indicators/dots -->
  <div class="carousel-indicators">
    <button type="button" data-bs-target="#demo" data-bs-slide-to="0" class="active"></button>
    <button type="button" data-bs-target="#demo" data-bs-slide-to="1"></button>
    <button type="button" data-bs-target="#demo" data-bs-slide-to="2"></button>
  </div>
  
  <!-- The slideshow/carousel -->
  <div class="carousel-inner">
    <div class="carousel-item active">
      <iframe src="https://www.facebook.com/plugins/video.php?height=314&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F459845055040515%2F&show_text=false&width=560&t=0" width="560" height="314" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share" allowFullScreen="true"></iframe>
    </div>
    <div class="carousel-item">
      <iframe src="https://www.facebook.com/plugins/video.php?height=476&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F552340910863202%2F&show_text=false&width=267&t=0" width="267" height="476" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share" allowFullScreen="true"></iframe>
    </div>
    <div class="carousel-item">
      <iframe src="https://www.facebook.com/plugins/video.php?height=476&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F569815228855244%2F&show_text=false&width=267&t=0"></iframe>
    </div>
  </div>
  
  <!-- Left and right controls/icons -->
  <button class="carousel-control-prev" type="button" data-bs-target="#demo" data-bs-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </button>
  <button class="carousel-control-next" type="button" data-bs-target="#demo" data-bs-slide="next">
    <span class="carousel-control-next-icon"></span>
  </button>
</div>

<div class="container-fluid mt-3">
  <h3>Carousel Example</h3>
  <p>The above example shows how to create a basic carousel with indicators and controls.</p>
</div>

</body>
</html>

Solution

The next icon appears into the right side white space; its color is white so it is not visible. If you can show the right arrow, just give all iframes width:100% so content is set to the full width and you can show the right > arrow.

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>

<!-- Carousel -->
<div id="demo" class="carousel slide" data-bs-ride="carousel">
    <!-- Indicators/dots -->
    <div class="carousel-indicators">
        <button type="button" data-bs-target="#demo" data-bs-slide-to="0" class="active"></button>
        <button type="button" data-bs-target="#demo" data-bs-slide-to="1"></button>
        <button type="button" data-bs-target="#demo" data-bs-slide-to="2"></button>
    </div>
    <!-- The slideshow/carousel -->
    <div class="carousel-inner">
        <div class="carousel-item active w-100">
            <iframe src="https://www.facebook.com/plugins/video.php?height=314&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F459845055040515%2F&show_text=false&width=560&t=0" width="100%" height="400" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share" allowFullScreen="true"></iframe>
        </div>
        <div class="carousel-item w-100">
            <iframe src="https://www.facebook.com/plugins/video.php?height=476&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F552340910863202%2F&show_text=false&width=267&t=0" width="100%" height="400" style="border:none;overflow:hidden" scrolling="no" frameborder="0" allowfullscreen="true" allow="autoplay; clipboard-write; encrypted-media; picture-in-picture; web-share" allowFullScreen="true"></iframe>
        </div>
        <div class="carousel-item w-100">
            <iframe src="https://www.facebook.com/plugins/video.php?height=476&href=https%3A%2F%2Fwww.facebook.com%2FNoizekontrol%2Fvideos%2F569815228855244%2F&show_text=false&width=267&t=0" width="100%" height="400"></iframe>
        </div>
    </div>
    <!-- Left and right controls/icons -->
    <button class="carousel-control-prev" type="button" data-bs-target="#demo" data-bs-slide="prev">
        <span class="carousel-control-prev-icon"></span>
    </button>
    <button class="carousel-control-next" type="button" data-bs-target="#demo" data-bs-slide="next">
        <span class="carousel-control-next-icon"></span>
    </button>
</div>
<div class="container-fluid mt-3">
    <h3>Carousel Example</h3>
    <p>The above example shows how to create a basic carousel with indicators and controls.</p>
</div>

I just give the width:100% and give static height for the showing right arrow, which you can modify as per your requirement.