Hi, I am also wondering the same, as to how we can get the new document presented in iOS upon launch. Have you find any answer elsewhere?

I am really surprised by the quality of this particular session on WWDC20. Video on this was very short, and there is apparently no source code, or either any meaning piece of copy code provided with the video. I am guessing there was a last minute change since the Memoji does not much resemble the presenter. Anyway, the point is I am sure there is a lot of developers like myself who want to adopt Document Based Swift UI app, and will highly appreciate as much guidance from Apple as possible to get rolling. If someone from Apple is reading this, please reach out to I-Ting Tina Liu - https://apple.com/bit.ly/31HGD65 (remove apple.com from the URL) to post the code here or better on the developer app/portal. Thanks.