Hello,
Start11 will add additional features for taskbar on Windows 11in its later updates. Tentatively will be in V1.2X. Hopefully, it will be available soon.

Thanks
Basj,
Stardock Community Assistant.

I am a new user of Start 11, on 1.22 currently, and I really would like the "Drag & Drop to the Taskbar" feature.  I used it all the time in WIn10/Win7.  Hopefully this will find its way into a near-term release.

I am sorry I should have been more specific- yes, both Windows 11 and Start11 allow drag and drop from one File Explorer explorer window to a minimized File Explorer window.  But it neither will work when dragging attachments from Outlook onto a minimized File Explorer window, or a minimized Outlook mail message.  Windows 10 and prior do have this functionality.

I am using Outlook 365 Version 2204 in Windows 11.  I did not test this version of Outlook in Windows 10. 

I am on version 1.36 and the functionality is still not there.