In my case it would be necessary for me to be able to convert for example $season with the calculated value of the sports season. Is it possible by using onWfFileSystemGetPathVariables event in a plugin ?

public function onWfFileSystemGetPathVariables(&$variables)
    {
        // no variable set
        if (empty($variables)) {
            return;
        }

        // prepare as regular expression
        $variable = '/' . preg_quote('$season', '/') . '/';
        
        // get season using internal function
        $value = $this->getCurrentSeason();

        $variables['path_pattern'][] = $variable;
        $variables['path_replacement'][] = $value;
}