I have the same problem having purchased a new HJP Laptop with windows 11 installed.
I have spent countless hours over the last 3 weeks initially getting the laptop to recognise the [printer which is now resolved.
I can print but the scan shortcut uses the windows scan which has completely different operations and I can scan a doc but it does not allow multiple pages.
I did find advice on line which made it work perfectly. However when restarted it reverted again.
I have an Epson all in one print and scan which perfectly on windows 10.
I understand that there are two modes the Epson scan and windows scan. I did find a web site that explained the issue but had no resolution. in tht it depends on which system detects the scanner. I just need a way to make it use Epson not windows.
As others have said it is deeply disappointing that an upgrade does not work and in effect is a downgrade.
Really appreciate some help