<div class="container-xxl mb-3 bg-secondary">
    <div class="py-3">
        <h1 class="text-white">Welcome</h1>
    </div>
</div>

<div class="container-xxl">

    <div class="row mb-3">
        <div class="col-2">
            <span class="placeholder col-12"></span>
        </div>
    </div>

    <div class="row">

        <div class="col-6">
            <img class="img-fluid" src="https://picsum.photos/id/435/740/400" alt="">
        </div>

        <div class="col-6">
            <img class="img-fluid" src="https://picsum.photos/id/557/740/400" alt="">
        </div>

    </div>

</div>