I have been using Dropbox Paper for over 5 years for the hopes that one day I would be able to edit my tables from my phone or tablet. That day never came. Me and my partner can't rely on Dropbox Paper because we need a laptop/PC to be able to add or edit our tables in our shared documents, how ridiculous!
I'm not sure why the ability to edit your tables from a tablet or phone is non-existent when the Paper documents are cross platform.
Please, PLEASE add support for iOS and Android devices to be able to add and edit tables in Dropbox paper (even adding removing columns and rows would be super useful).