Is it possible to set a new route for a plug-in CP section in Craft 3? Is it possible to use a custom route for your plugin's CP section, instead of cpTrigger/plugin-handle, or to direct cpTrigger/plugin-handle to a different template other than plugin-handle/index.twig?
Of course you can Link

Event::on(UrlManager::class, UrlManager::EVENT_REGISTER_CP_URL_RULES, function(RegisterUrlRulesEvent $event) {
    $event-&gt;rules['whateveryoulike'] = ['template' =&gt; 'cocktails/_edit'];
    $event-&gt;rules['cocktails/&lt;widgetId:\d+&gt;'] = 'cocktails/edit-cocktail';
});


So the url www.example.com/admin/whateveryoulike redirects you to the template cocktails/_edit. You don't need to use the plugin-handle, you can overwrite everything but you have to make sure no other plugin overwrites your routes..