Hi arubislander,
Thank you for your reply.
I did find requests on Github about the sorting possibilities on the name. I followed your advice and joined the ongoing requests => https://github.com/ubports/address-book-app/issues/12#issuecomment-552354416
It would be a great pleasure to help of implementing the features but I have not the skills to do it, unfortunately.
About my remark about the impossibility of exporting the address book, I just discovered that it is actually possible. I apologize for the mistake.