Hello, hansiem.
I'd be happy to assist you today. Even if you check the box for the "send later' option, this will not automatically send to you or your customer's email. However, you can always look for the transaction and send it.
I'm leaving you some resources to help you manage and categorize your downloaded receipts in QuickBooks Online:
Keep me posted if you have any other questions. I'd be glad to provide additional assistance. Have a good one.