Specific case, when you need to hide/show Elementor widget, through Dynamic Visibility (Dynamic.ooo), in case post have checked any term from custom taxonomy.

Steps:

• activate Dynamic Visability
• choose triggers “Dynamic Tags”
• choose Dynamic Tag – PHP
• enable “Return as Data”
• change custom_taxonomy with your taxonomy name and copy this code  – $terms = get_the_terms( $post->ID, ‘custom_taxonomy ); if ($terms) { return true; }