searchform.php

<form action="/" method="get">
    <label for="search" class="form-label visually-hidden">Search in <?php echo home_url( '/' ); ?></label>
    <div class="input-group">
        <input type="search" name="s" id="search" class="form-control" value="<?php the_search_query(); ?>" aria-label="Search in <?php echo home_url( '/' ); ?>" aria-describedby="search-submit" placeholder="Search..." />
        <button type="submit" class="btn btn-primary hstack" id="search-submit" title="Submit">
            <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-search" viewBox="0 0 16 16">
                <path d="M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001c.03.04.062.078.098.115l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85a1.007 1.007 0 0 0-.115-.1zM12 6.5a5.5 5.5 0 1 1-11 0 5.5 5.5 0 0 1 11 0z"/>
            </svg>
        </button>
    </div>
</form>