<div class="container">

<div class="item">
  <div class="item__content">
    Lorem ipsum dolor sit
  </div>
  <div class="item__dotted"></div>
  <div class="item__btn">
    <button>Копка</button>
  </div>
</div>
  
  <div class="item">
  <div class="item__content">
    Lorem ipsum dolor sit amet
  </div>
  <div class="item__dotted"></div>
  <div class="item__btn">
    <button>Копка</button>
  </div>
</div>
  
  <div class="item">
  <div class="item__content">
    Fuga natus rem, est doloribus fugiat inventore accusantium exercitationem harum magni mollitia?
  </div>
  <div class="item__dotted"></div>
  <div class="item__btn">
    <button>Копка</button>
  </div>
</div>
  
  </div>

.container {
  max-width: 800px;
  margin: 0 auto;
}

.item {
  display: flex;
  align-items: center;
  padding: 10px 5px;
}

.item__content {
  font-size: 16px;
  padding: 5px;
}

.item__dotted {
  border-top: 1px dotted #000;
  flex-grow: 1;
}

.item__btn {
  padding: 5px;
}