Hi,
When you change manually the status of an order from "created" to "confirmed" in the backend, only the order status notification email will be sent to the customer.
The "payment notification" email is sent when a payment notification is received by a payment method which leads to an error or the confirmation of the order. So yes, when PayPal sends the payment notification to HikaShop and the order is confirmed, the payment notification email will be sent.
Also, if you want to change the receiver of that email, you have the setting "payment notification email addresses" in the HikaShop configuration. That's where you want to enter the email addresses separated by commas.
And yes, you can also enter the additional email addresses in the CC or BCC fields of the email. It will work like the CC or BCC fields of your email client:
www.howtogeek.com/128028/htg-explains-wh...en-sending-an-email/