Yes, it is possible, only if your PDF eBook's document permissions allow editing. (Some PDF eBooks may not allow any changes at all.)
Additionally, the editing feature is not free in Acrobat Reader for iOS (unfortunately). It requires a subscription to the Acrobat Pro DC service.
In Acrobat Reader for iOS, please go to My Account and tap "Adobe Acrobat Pro DC".
You will be prompted to subscribe to the Acrobat Pro DC service.
Once you are subscribed to the paid service and sign in with your Adobe ID, the Organize Pages feature is made available for you.
Now you can delete, reorder, and rotate pages.
Please let us know if you have additional questions.