How to add delete confirmation in laraadmin modules?

I do not know how to work with laraadmin but You can do that by java script:

Blade:

@foreach (items as item)
    <form class="delete" action="{{ route('item.destroy', $item->id) }}" method="POST">
        <input type="hidden" name="_method" value="DELETE">
        <input type="hidden" name="_token" value="{{ csrf_token() }}" />
        <input type="submit" value="Delete">
    </form>
@endforeach

JS:

<script>
    $(".delete").on("submit", function(){
        return confirm("Do you want to delete this item?");
    });
</script>

And if you need preety nice confirmation design You can use Sweet Alert JS Library: https://sweetalert.js.org/guides/