Logging is important part for development. In magento 2.4+ version, the Laminas-log module is removed. So previous method will not work in new magento versions.

 $writer = new \Zend_Log_Writer_Stream(BP . '/var/log/custom.log');
 $logger = new \Zend_Log();
 $logger->addWriter($writer);
 $logger->info("Example Log");

You can above code for magento 2.4+ version.
 

Thank you!