It would be useful to have a reporting view that can show how many emails were sent through each connected email account in a workspace on a specific day/timeframe. (Total sending across all campaigns) The closest thing I see for that data would be to look at the Email Accounts page at the end of the set work hours for a workspace, but that would have to be done daily as that page only shows the current day's sent volume.
This data view is useful for confirming sending has happened as planned and can give better insight into individual email account health / can make it much easier to identify if an email account has been set to over/under send compared to others or maybe was imported to a workspace but not connected to any campaigns, etc. It would provide transparency and clearly confirm that the number of emails sent matches the account settings (or would highlight if any accounts are being underused or were disconnected etc.)