Thank you for joining the thread, @bhsat2012.

Let me help you with your concern. You've mentioned that you're no longer at Intuit which means you can't use payment links outside of it. 

I'll recommend contacting Elavon/Converge support to answer your queries about sending multiple invoices.

You can read through this article if you want to know what's new in QuickBooks Desktop 2023.

If you have additional questions about the invoice and payment link. I'll be always here. Have a good day!