As shared that its an scanned page, and a scanned page doesn't contain the real text. So the content of the pdf is a image which isn't converting to the word doc.
Are you experiencing this problem with one specific document or multiple files? Could you please check with a different file and conversion through the web browser?
Refer to the- https://cloud.acrobat.com/ and try the conversion through that.
Let us know if the result still comes out the same.