<div class="block-tabs-main-home__column">
  <div data-content-id="1" class="block-tabs-main-home__item">
      <span>Клик</span>
  </div>
</div>
<div data-id="1" class="fits-cars-showmore-content">
  <div class="block-tabs-main-home__item">
      <span>Контент</span>
  </div>
</div>

<div class="block-tabs-main-home__column">
  <div data-content-id="2" class="block-tabs-main-home__item">
      <span>Клик</span>
  </div>
</div>
<div data-id="2" class="fits-cars-showmore-content">
  <div class="block-tabs-main-home__item">
      <span>Контент</span>
  </div>
</div>

.fits-cars-showmore-content{
  display: none;
}
.fits-cars-showmore-content_active{
  display: block;
}

.block-tabs-main-home__column{
  cursor:pointer;
  font-size:30px;
  color:red;
}

const autoBtns = document.querySelectorAll('.block-tabs-main-home__item');
  autoBtns.forEach(
    btn => {
      btn.addEventListener("click", (e) => {      
        const contentId = btn.getAttribute("data-content-id");     
        document
            .querySelectorAll(`[data-id="${contentId}"], .fits-cars-showmore-content_active`)
            .forEach( (el) =>
              el.classList.toggle('fits-cars-showmore-content_active')
            )
          }
      );
    }
  );