<body>
<div class="modal fade" id="modalID" tabindex="-1" data-bs-backdrop="true" style="border-radius:38px;">
<div class="modal-dialog">
<div class="modal-content">
Lorem ipsum ....
</div>
</div>
</div>
</body>
<script>
// Bootstrap 5
let modal = new bootstrap.Modal( document.querySelector('#emailValidation'), { backdrop: true, keyboard: true } );
modal.toggle();
</script>