Ah, I see now sorry to keep running in circles like that. As far as I know there is no such statement nor I can give you one since I’m not part of the project. I agree that an official statement detailing how /e/ is making progress would be highly beneficial.
I expect that statement to come eventually, maybe with the 1.0 version release. For what is worth, you can kind of see what progress has been made through the latest updates posted in the forum, afterall actions speak louder than words so to speak. For your reference:
2019 Summer Update
Update and 2020 Roadmap
There is this external review and is interesting to read about the issues /e/ had, and how there has been some progress (even if there’s still a lot of work left to do). Is not a full audit of the code or anything like that, but one of the most in depth reviews that I know of.
Review by Infosec-Handbook - part 1
Review by Infosec-Handbook - part 2
Review by Infosec-Handbook - part 3
Hope this helps, and really please let us know how does Ubuntu Touch works for you, we are all interested in finding alternatives to Google ecosystem 