Scanned document - pages have different sizes

Hello, I have a question on the Files app on my iPhone.

I use it to scan documents, but I noticed when I scan one A4 document having multiple pages, they all have different sizes. For example, page 1 is 62.55 × 88.52 cm, page 2 is 75.96 × 107.71 cm and so on.

Is there a way to set for example all the pages to be A4 size (like the original document is)?