I can share some information about finding your quotation emails, David.
The option to view the email is currently unavailable. However, you can generate Quotes by Customer report, and then add the Sent column to view the status.
Here's how:
Go to the Reports menu and then look for Quotes by Customer.
Click the Gear icon in the report and then tick the checkbox for Sent.
Set all the filter.
Click on Run report.
Here's detailed guidance with running and adding filters to the report to get all the information you need: Run reports in QuickBooks Online.