discourse/app/assets/stylesheets/mobile/sidebar.scss

:root {
  --d-sidebar-row-height: 2.4em;
}

.sidebar-section-form-modal {
  .row-wrapper {
    grid-template-columns: 4.5em repeat(2, 1fr) 2em;
    .link-icon {
      grid-column: 1;
    }
  }
}