看看这个

.container {
  padding: 20px;
  border: 2px solid black;
  display: flex;
  gap: 15px;
  border-radius: 10px;
}

.left-column {
  border: 1px solid lightgray;
  display: flex;
  justify-content: center;
  align-items: center;
  flex:auto;
}

.right-column {
  border: 1px solid tomato;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
flex:1;
}

.button-link {
  border: 2px solid black;
  padding: 10px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  white-space: nowrap;
}

<div class="container">
  <div class="left-column">
    Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut
    labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco
    laboris nisi ut aliquip ex ea commodo consequat.
  </div>
  <div class="right-column">
    <a class="button-link">A link button</a>
    <a class="button-link">Another link button</a>
  </div>
</div>

<style>
    .container {
        padding: 20px;
        border: 2px solid black;
        display: flex;
        gap: 15px;
        border-radius: 10px;
    }

    .left-column {
        border: 1px solid lightgray;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
    }

    .right-column {
        border: 1px solid tomato;
        display: flex;
        flex-direction: column;
    }

    .button-link {
        border: 2px solid black;
        padding: 10px;
        display: flex;
        justify-content: center;
        align-items: center;
        border-radius: 10px;
        white-space: nowrap;
    }
</style>

只需添加flex：1按钮链接，例如：

.button-link {
    border: 2px solid black;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    white-space: nowrap;
    **flex: 1;**
}