flex-row

bootstrap5.css

bootstrap5.css
.flex-row {
  -ms-flex-direction: row !important;
  flex-direction: row !important;
}
bootstrap5.css
.flex-row-reverse {
  -ms-flex-direction: row-reverse !important;
  flex-direction: row-reverse !important;
}

html bootstrap5 Sample

flexコンテナの主軸方向 左から右：flex-row

flex文字01
flex文字02
flex文字03
  <div class="d-flex flex-row">
    <div>flex文字01</div>
    <div>flex文字02</div>
    <div>flex文字03</div>
  </div>

flexコンテナー内のアイテムの配置/rowで右から左：flex-row-reverse

flex文字01
flex文字02
flex文字03
  <div class="d-flex flex-row-reverse">
    <div>flex文字01</div>
    <div>flex文字02</div>
    <div>flex文字03</div>
  </div>