J4 load template selected params by menu assign

Detail: admin copy template,  template assign by menu item. This copied can change params

Explain: when duplicate template, db will create 1 row template_style new id. And param can change. Template assign by menu item -> #_menu have column 'template_id'

Solution:

template_name/index.php

use Joomla\CMS\Factory;

$app   = Factory::getApplication();
/*getparameName*/
$paramValue = $app->getTemplate(true)->params['param_name'];