Happy to have you here in the Intuit Community, info394.
I can help share some information about creating the same invoice to multiple customers.
Currently, the feature you're looking for is only available in QuickBooks Online Advanced. However, you can use the unscheduled invoice template to create one recurring, unscheduled invoice and use it over and over again.
To do this task, here's how:
Once you're ready to charge your customers, you can use the unscheduled invoice template.
The steps above will prevent you from having to enter the same information each time.
To know more about templates for recurring transactions, you can check this article: Create templates for recurring transactions.
You may also find this article helpful in the future: Set up and send progress invoices in QuickBooks Online.
As always, you're welcome to come back to me if you have any follow up questions about creating the same invoice for multiple customers. I'd be happy to answer it for you.