Customize taxonomy term before it is indexed by SearchWP

searchwp-customizations.php

<?php

// Customize taxonomy term before it is indexed by SearchWP.
add_filter( 
  'searchwp\source\post\attributes\taxonomy\term', 
  function( $term, $args ) {
    // Add 'coffee' to specific term name so it is searchable.
    if ( 'My Custom Term' === $term->name ) {
      $term->name .= ' coffee';
    }
    
    return $term;
  }, 
  20, 2 
);