Can I scan multiple pages at once on my iPad Pro

Presumably you have a Brother multifunction printer that incorporates a document scanner.

To scan directly from the printer to your iPad, you will need to install the correct companion App for your Brother printer - this being available from the Apple App Store. Perhaps one or other of these Apps will be what you are looking for...

• Brother iPrint&Scan

https://apps.apple.com/app/brother-iprint-scan/id382775642

• Brother Mobile Connect

https://apps.apple.com/app/brother-mobile-connect/id1516235668

Alternatively, your iPad can simply "scan" single or multipage documents using the iPad camera:

Scan documents with your iPad camera - Apple Support

Scan text and documents in Notes using the iPad camera - Apple Support

Once scanned as a PDF, you can edit or complete forms with your iPad:

Work with PDFs in Notes on iPad - Apple Support

Use Markup to add text, shapes, signatures, and more to documents on iPad - Apple Support

Not quite sure what you are asking …. It sounds like you may have a form or some other type of document that needs to be scanned and filled out on your iPad.

if that is why you want please indicate that, if no please try to be clearer.