Add Notes to all rows and columns

functions.php

add_filter( 'fl_builder_register_settings_form', function( $form, $id ) {
	if ( in_array( $id, array( 'row', 'col' ) ) ) {
		$form['tabs']['notes'] = array(
			'title' => 'Notes',
			'sections' => array(
				'notes' => array(
					'title' => '',
					'fields' => array(
						'note' => array(
							'title' => 'Note',
							'type' => 'code'
						)
					)
				)
			)
		);
	}
	return $form;
}, 10, 2 );