Hi,
Normally, the administrator receives a payment notification email when the order is paid. This is usually done automatically by the payment plugin you're using.
All the payment plugins we developed do that, but maybe some other, third party payment plugins don't, or maybe not always.
Also, if you've emptied the "payment notification email address" setting of the HikaShop configuration, then the email isn't sent.
Besides that, what you can also do is add your email address in the BCC field of the order status notification email. That way, you'll get a copy of the email sent to the customer when the order is confirmed.