.customize-control-kirki-typography {
  .wrapper {
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    border: 1px solid rgba(0,0,0,.1);

    .color,
    .font-backup,
    .font-family,
    .font-size,
    .letter-spacing,
    .line-height,
    .subsets,
    .variant,
    .margin-top,
    .margin-bottom {
      width: 100%;
      float: none;
      clear: both;

      h5 {
        margin: 0.67em 0 0;
      }
    }

    .font-size,
    .letter-spacing,
    .line-height,
    .margin-top,
    .margin-bottom {
      width: 48%;
    }

    .color {
      width: auto;
    }
  }
}

.customize-control-kirki-typography {
  .wrapper {
    padding: 10px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    border: 1px solid rgba(0,0,0,.1);

    .color,
    .font-backup,
    .font-family,
    .font-size,
    .letter-spacing,
    .line-height,
    .subsets,
    .variant,
    .text-transform,
    .margin-top,
    .margin-bottom {
      width: 100%;
      float: none;
      clear: both;

      h5 {
        margin: 0.67em 0 0;
      }
    }

    .font-size,
    .letter-spacing,
    .line-height,
    .margin-top,
    .margin-bottom {
      width: 48%;
    }

    .color {
      width: auto;
    }
  }
}

Fix label space for text-transform
Fix label space for text-transform