justify-content-start

bootstrap5.css

.justify-content-start {
  -ms-flex-pack: start !important;
  justify-content: flex-start !important;
}

html bootstrap5 Sample

左寄せで配置：justify-content:flex-start

col-4

  <!-- 左寄せでスタート、12の残りは勝手に余白になる -->
  <div class="row justify-content-start">
    <div class="col-4">col-4</div>
    <div class="col-4">col-4</div>
  </div>

flex横の均等配置/左詰めで整列：justify-content-start

flex文字01

flex文字02

flex文字03

  <div class="d-flex justify-content-start">
    <div>flex文字01</div>
    <div>flex文字02</div>
    <div>flex文字03</div>
  </div>