Feature Request: Add "Recent Activity Feed" combining Sent & Received emails

You can more or less already do this with Search Folders and Conditional Formatting.

Granted, in New Outlook the filter to only display emails from today, yesterday, or a specific date range is sadly still missing, but that will come eventually.

An example with a similar concept for Classic Outlook can be found here; Today's Unread Mail folder - Robert 365

You can combine that with Conditional Formatting to distinguish emails you've sent and emails that you've received in case you do not want to group by folder; Color Code your Emails, Calendar or Tasks automatically with Conditional Formatting - Robert 365

Within New Outlook, Conditional Formatting can be found as a separate sub section of Mail in the Settings page.