Email accounts disappeared from my iCloud

Mackirdy wrote:

Hi, I am an iMac user and not technical so hope you can help me simply. A Big Sur update has just completed. I have 3 email accounts which have worked similarly and well but after this update the bin has disappeared completely from my iCloud mail account. There is a "deleted" box but if I delete an iCloud email it does not appear in the iCloud deleted item folder. If I conduct a search I can find it but I have no idea where it is being stored so I can find a mistakenly deleted email. Please can you help? MacKirdy

See if hovering your mouse allows you to add + in the section area ex Favorites

You may have to exit Full screen mode if you do not see it come into view

If it is a matter of Nothing showing there is a Show/Hide as well