I'm having issues creating scanned documents from the printer feeder. I have to sit and manually tell the scanner to scan the next document. The issue appeared to have begun after I started using Windows 11.
I would check for an updated driver for your device for Win11. Acrobat's uses your scanner's driver. Many older drivers were 32-bit and many manufacturers have made the ehoice to either issue updated drivers in 64-bit or not bother at all... in which case there are many older scanners that will not function properly, or worse, not at all.
One way to test is to see if your scanner works properly using it's own standalone application and not through Acrobat.