Can I drag and drop PDF files on an iPad Pro?
What desktop functions will I lose with an iPad Pro versus a Macbook?
MacBook Air 13″, macOS 15.0
Yes, your iPad supports drag-and-drop.
The iPad User Guide is a rich (and often overlooked) source of information about iPad and iPadOS. Here is a direct link to the relevant section of the Guide:
Move and copy items with drag and drop on iPad - Apple Support