Haklısınız kaptırmışım kendimi kusura bakmayın.

functions.php dosyasına eklenecek kodlar:

function the_pagination() {
    if( is_singular() )
        return;
    global $wp_query;
    /** Stop execution if there's only 1 page */
    if( $wp_query->max_num_pages <= 1 )
        return;
    $paged = get_query_var( 'paged' ) ? absint( get_query_var( 'paged' ) ) : 1;
    $max   = intval( $wp_query->max_num_pages );
    /** Add current page to the array */
    if ( $paged >= 1 )
        $links[] = $paged;
    /** Add the pages around the current page to the array */
    if ( $paged >= 3 ) {
        $links[] = $paged - 1;
        $links[] = $paged - 2;
    }
    if ( ( $paged + 2 ) <= $max ) {
        $links[] = $paged + 2;
        $links[] = $paged + 1;
    }
    echo '<div class="row">
                                <div class="col-md-12">
                                    <nav>
                                        <ul class="pagination justify-content-center">' . "n";
    /** Previous Post Link */
    if ( get_previous_posts_link() )
        printf( '<li class="page-item">%s</li>' . "n", get_previous_posts_link('<span class="fas fa-angle-left"></span>') );
    /** Link to first page, plus ellipses if necessary */
    if ( ! in_array( 1, $links ) ) {
        $class = 1 == $paged ? 'active' : '';
        printf( '<li class="page-item %s"><a class="page-link" href="%s">%s</a></li>' . "n", $class, esc_url( get_pagenum_link( 1 ) ), '1' );
        if ( ! in_array( 2, $links ) )
            echo '<li class="page-item disabled"><a class="page-link">…</a></li>';
    }
    /** Link to current page, plus 2 pages in either direction if necessary */
    sort( $links );
    foreach ( (array) $links as $link ) {
        $class = $paged == $link ? 'active' : '';
        printf( '<li class="page-item %s"><a class="page-link" href="%s">%s</a></li>' . "n", $class, esc_url( get_pagenum_link( $link ) ), $link );
    }
    /** Link to last page, plus ellipses if necessary */
    if ( ! in_array( $max, $links ) ) {
        if ( ! in_array( $max - 1, $links ) )
            echo '<li class="page-item disabled"><a class="page-link" style="cursor: alias;">…</a></li>' . "n";
        $class = $paged == $max ? 'active' : '';
        printf( '<li class="page-item %s"><a class="page-link" href="%s">%s</a></li>' . "n", $class, esc_url( get_pagenum_link( $max ) ), $max );
    }
    /** Next Post Link */
    if ( get_next_posts_link() )
        printf( '<li class="page-item">%s</li>' . "n", get_next_posts_link('<span class="fas fa-angle-right"></span>') );
    echo '
                                        </ul>
                                    </nav>
                                </div>
                            </div>' . "n";
}

Biraz karışık ama HTML kodlarını kendi tasarımınıza uygun şekilde düzenleyebilirsiniz.
index.php ve herhangi bir sayfa içerisine yazılacak kod:

<?php the_pagination(); ?>

Sonuç: