You cannot jump to a specific page of a document in ‘Files’ but you can in ‘Preview.’
No matter which sub-menu you try, there is no “Go to page” option. You need the new Preview app in iOS 26 and then you’re allowed to go directly to a specific page number. Kind of annoying because I like scanning my books as a backup, and it’s annoying to scroll hundreds of pages down to get to a specific page.
You need iOS 26 or iPadOS 26 to download the Preview app. The good thing is the Files app in iOS 26 gives you a Preview button at the bottom, making it one tap to jump right in.
To be clear, the Files app never had the “Go to page” option from what I can recall. I used an iPhone 14 with iOS 18 installed to confirm that Files does not have that option. You will need to upgrade to iOS 26 to get Preview or download a 3rd party app if your device doesn’t support iOS 26.