JSFiddle - React, Tailwind, and code Playground

HTML

<form name="filters" autocomplete="off" class="filters">
  <div class="pole-f-1">
    <div class="box-p-1">
      <button type="button" class="but-p">Марка
        <img src="/images/icon/strelka.svg" class="strelka">
      </button>
    </div>

    <div class="box-p-1">
      <button type="button" class="but-p">Модель
        <img src="/images/icon/strelka.svg" class="strelka">
      </button>
    </div>

    <div class="box-p-1">
      <button type="button" class="but-p">Поколение
        <img src="/images/icon/strelka.svg" class="strelka">
      </button>
    </div>
  </div>
</form>

CSS

.pole-f-1 {
                display: flex;
                flex-direction: column;
                align-items: stretch;
            }
            button {
              width: 100%;
            }