Would you mind elaborating the query for us? Are you referring to the PDF view on the bigger screen size of iPhone X?
Can you provide more details on this? We’re here to help, just need more info.
i mean remove the top and bottom black bars in pdf viewer on iPhone and take advantage of the full screen.
Please use the following link to submit/file a feature request Adobe Acrobat for iPhone and iPad - Feature Request/Bug Report Form
Feel free to update this discussion in case you need further assistance.