System Plugin - onBeforeCompileHead - you can walk through any assets for the head. Where the head is rendered https://github.com/joomla/joomla-cms/blob/9c576378b4809a245f6fcf18bdbbd00baa4f7ac2/libraries/joomla/document/html/renderer/head.php

ProcessInput.php

<?php

public function onBeforeCompileHead()
{
    $head = JFactory::getDocument()->getHeadData();
    $styleSheets = $head['styleSheets'];
    $newStyleSheets = array();

    foreach ($styleSheets as $key => $value)
    {
       if (/**  test if you want it */) 
       {
            $newStyleSheets[$key] = $value;
        }
     }            
            
     $head['styleSheets'] = $newStyleSheets;
     JFactory::getDocument()->setHeadData($head);
...