I want to implement a live activity in Xcode, what documentation should I check?

Hi there, I'm trying to set this photo as my lock screen. When I do it by itself without widgets, it returns as a black screen (only showing the time, date, camera and flashlight buttons). Even with the widgets, I still see a black screen. Can anyone reproduce it?

How do I overlay an annotation/detail popup to AR Models in QuickLook? This was done with the WWDC Trading Cards AR Model. I haven't been able to find any other info on this. Here is an article which has an image of what I am referring to https://vrscout.com/news/apple-shows-off-ar-trading-cards-ahead-of-wwdc-2022/

I'm getting asked questions by our security team about Xcode Cloud. They want to do an audit before we let it have access to our locally hosted gitlab repo. Is there any kind of security white paper for this product that I can point them at? Web searches haven't turned anything up for me to show to them.

Where and how do I watch other WWDC 22 sessions? Where can I find the schedule? I've been trying to look for a while, please help!