Dear Outlook for Work User,
Thanks for your update!
Baced on your information, I tested again.
I used the same settings of view as that of yours first, you can see my outlook view showed similar like your current display:
.
I tried different changes many times, and I found still the Compact view shows like what you want:
.
Since you mentioned that, in compact view, you do not have the reading pane, would you please change the view to compact first, and check whether you have the option to turn on the readning pane, if you can see it, choose Right:
.
If you still have this issue after changing to this view, please send me a screenshot of your view option navigation bar, I will try my best to investigate it fuether.
Thanks for your time and your understanding would be highly appreciated.
Sincerely,
Sherry | Microsoft Community Moderator