SWELL│Pjax遷移のSwiperカスタマイズの対応方法

<div class="swiper-container waza-pjax-slider" aria-label="サンプルスライダー">
  <div class="swiper-wrapper">
    <div class="swiper-slide"><p>スライド1</p></div>
    <div class="swiper-slide"><p>スライド2</p></div>
    <div class="swiper-slide"><p>スライド3</p></div>
  </div>
  <button type="button" class="waza-prev">前へ</button>
  <button type="button" class="waza-next">次へ</button>
  <div class="swiper-pagination"></div>
</div>

.waza-pjax-slider { max-width: 40rem; margin: 1rem auto; overflow: hidden; }
.waza-pjax-slider .swiper-slide { box-sizing: border-box; padding: 2rem; background: #f4f4f4; }
.waza-pjax-slider .swiper-pagination { position: static; margin-top: .5rem; }
.waza-pjax-slider button { padding: .5rem 1rem; border: 1px solid currentColor; }
.waza-pjax-slider button:focus-visible { outline: 2px solid #075cab; outline-offset: 2px; }

(() => {
  if (window.wazaPjaxSliderReady) return;
  window.wazaPjaxSliderReady = true;
  const instances = new Map();
  function init() {
    for (const [element, instance] of instances) {
      if (!element.isConnected) {
        if (!instance.destroyed) instance.destroy(true, true);
        instances.delete(element);
      }
    }
    if (typeof window.Swiper !== 'function') return;
    document.querySelectorAll('.waza-pjax-slider').forEach(element => {
      if (element.swiper && !element.swiper.destroyed) return;
      try {
      const instance = new Swiper(element, {
        loop: false,
        autoplay: false,
        speed: window.matchMedia('(prefers-reduced-motion: reduce)').matches ? 0 : 300,
        slidesPerView: 1,
        spaceBetween: 16,
        navigation: {
          nextEl: element.querySelector('.waza-next'),
          prevEl: element.querySelector('.waza-prev')
        },
        pagination: { el: element.querySelector('.swiper-pagination'), clickable: true }
      });
      instances.set(element, instance);
      } catch (error) {
        // 1件の失敗で、ほかのスライダーの初期化を止めない。
        console.warn("waza-pjax-slider: 初期化できない見本をスキップしました", error);
      }
    });
  }
  const after = window.SWELLHOOK && window.SWELLHOOK.barbaAfter;
  if (after && typeof after.add === 'function') after.add(init);
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init, {once: true});
  else init();
})();

<?php
add_action( 'wp_enqueue_scripts', 'waza_enqueue_pjax_slider', 20 );
function waza_enqueue_pjax_slider() {
    // Pjaxで途中からスライダーのページへ入れるよう、初回ページにも読み込む。
    wp_enqueue_style( 'swell_swiper' );
    wp_enqueue_script( 'waza-pjax-slider', get_stylesheet_directory_uri() . '/js/waza-pjax-slider.js',
        array( 'swell_script', 'swell_swiper' ), '1.0.0', true );
}