Profile: davidR-12

Problem:

The problem here is that the user wanted to display his shortcodes in widgets

Solution:
To use shortcodes in widget it will need to be a WYSIWYG editor widget

Try using this widget below and let me know if it helps.
https://wordpress.org/plugins/black-studio-tinymce-widget/

Problem: I would like to create a View that displays CPTs from a different post type that have the same lowest-level taxonomy term as the current CPT or term archive page. It should be dynamic so it can be included in a widget on many different CPTs and archives.

Solution: Add the following custom shortcode, which will return the lowest-level taxonomy term for a specific CPT or Archive:

add_shortcode( 'ts_deepest_location', 'ts_deepest_location_func');
function ts_deepest_location_func($atts)
{
  $id = $atts['id'];
  $terms = wp_get_post_terms( $id, 'locations', array( 'orderby' => 'id', 'order' => 'DESC' ) );
  $deepestTerm = false;
  $maxDepth = -1;
  foreach ($terms as $term) {
      $ancestors = get_ancestors( $term->term_id, 'locations' );
      $termDepth = count($ancestors);
      if ($termDepth > $maxDepth) {
          $deepestTerm = $term;
          $maxDepth = $termDepth;
      }
  }
  return $deepestTerm->slug;
}

To display the View on a CPT, use this shortcode in a shortcode argument for a View filtered by taxonomy:

[wpv-view name="featured-breaks-for-markets-view" wpvlocations="[ts_deepest_location id="[wpv-post-id id='$current_page']"]"]

To display the View on a taxonomy Archive, use a wpv-taxonomy-archive shortcode in a shortcode argument for a View filtered by taxonomy:

[wpv-view name="featured-markets-for-locations-view" wpvlocations="[wpv-taxonomy-archive info='slug']"]

Be sure to register the ts_deepest_location function in Toolset > Settings > Front end Content > 3rd Party Shortcode arguments.

Relevant Documentation:
https://toolset.com/documentation/user-guides/views-shortcodes/#wpv-post-taxonomy
https://toolset.com/documentation/user-guides/passing-arguments-to-views/