v1/web/modules/contrib/bootstrap_styles/scss/themes-overrides.scss

// Themes overrides for Barrio theme.
#bs_ui {
  .custom-control-label {
    &::before,
    &::after {
      display: none;
    }
  }
  .custom-control {
    padding-left: 0;
    margin-top: 10px;
    margin-bottom: 10px;
  }
  .custom-switch {
    padding-left: 0;
  }
}