Currently, the option to send a copy of a bill is unavailable. Right now, you can send a copy of a bill payment within the Expenses screen. I'd be happy to walk you through how:
Go to the Expenses menu, then click the Expenses tab.
Select the Filter drop-down, then select the transaction type Bill Payments
Apply additional filters if required, then hit Apply
Select the transaction you wish to send.
Click Batch actions and select Send remittance.
Hit Send.
Check if the email address is correct, then click Send
For additional information, I've attached some articles you can use to view items in bill payment, as well as to see what's new in QuickBooks: