Using older versions of Outlook for Mac for personal email and calendar
Hi nightearth,
Thank you for the pointing out.
You can refer to the https://support.office.com/en-us/article/customize-views-in-outlook-for-mac-257d7104-5c90-4ee3-bad2-9935ab424c64 to customize views in Outlook for mac.
In that case the "date sent" should not be there when sorting messages in the inbox, that is certianly rational. You can vote your request at thehttps://outlook.uservoice.com/forums/293343-outlook-for-macOutlook for Mac User Voiceand related team will be notified.
Appreciate again for your finding.
Yours Sincerely,
George