Using New Outlook on Windows for personal email, calendar, and contact management
Sadly that doesn't work with New Outlook. There's no developer tab to be turned on in the ribbon so you can't make a fancy unified inbox for yourself.
I'm still somewhat shocked that Outlook doesn't have a unified inbox. On my iPhone/iPad/Mac it's there by default in the Apple mail apps. Before I used Outlook I used to have a unified inbox (back in 2012 and I can't even remember which tool I was using then!). They are so behind the curve in making something that it's somewhat amazing.