You can now modify Taxonomy columns using the same methods as you would for a PostType. For example:

// Create a taxonomy.
$genres = new Taxonomy( 'genre' );
// Add a column to the taxonomy admin table.
$genres->columns()->add( [
'popularity' => __( 'Popularity' ),
] );
// Register the taxonomy to WordPress.

Please refer to the PostTypes column documentation for more on how to work with the column manager.