Bootstrap Barrio comes with additional theme suggestions for common Drupal elements and body classes for content types.
page__node__<NODE-BUNDLE>.html.twig
Specific body classes are added to body for entity types:
Barrio includes predefined icons for default menu links.
It also sets classes to identify menu links.
To extend the usage of the links, in your subtheme css file include the following snippet:
Bootstrap Barrio SASS Theme Development Guide
This guide explains how to set up and develop a custom Bootstrap Barrio SASS sub-theme for Drupal.
Bootstrap 4/5 SASS - Barrio Starter Kit is a Barrio or Bootstrap sub-themes that simplifies integrating Bootstrap 4/5 SASS with Drupal. For Bootstrap Theme use the subtheme included with the theme.
This sub-theme overrides almost every CSS from Drupal and replaces where possible Bootstrap variables in order to generate from roots a new set of CSS files.