What was added in the version2 of the feature set?

Is there anyway that we as users can set apps to not be able to play audio? There have been times that I want to listen to music and then scroll specific social media apps, and the social media apps keep interrupt the audio. I made a feedback related to this last year: FB18494861

First I would like to thank all the people who have been working hard to put on the group labs, they have been very informative. Maybe it should be considered to either have the group labs one week later so those who attend stuff in person can still have the opportunity to participate in the group labs, also it gives people time to explore the new stuff to formulate better questions. Also why not record the group labs, I am sure there are more people that could benefit from it later on either to review something they may not have completely got the first time, or because they missed for real life reasons. I know there are people with learning disabilities and may need the content to be slowed down or reviewable later. We all learn from all the questions people ask in the labs, let's make it more accessible to everyone! Also maybe have it so that the questions that didn't get answered in the group lab automatically get put into the forum and then get answered there. Also why are the Q&As not staying up after the time block even in a read only capacity. They aren't even listed on the developer activities list near where the group labs are listed.

For the CountdownDuration initializer, since passing nil to both parameters of public init(preAlert: TimeInterval?, postAlert: TimeInterval?) is not considered valid, shouldn't the function signature be changed to be two separate inits, instead of a runtime error. EX: public init(preAlert: TimeInterval, postAlert: TimeInterval?) public init(preAlert: TimeInterval?, postAlert: TimeInterval)

Are we not supposed to be able to make custom Picker Styles? struct CustomPickerStyle: PickerStyle { static func _makeView<SelectionValue>(value: _GraphValue<_PickerValue<CustomPickerStyle, SelectionValue>>, inputs: _ViewInputs) -> _ViewOutputs where SelectionValue : Hashable { } static func _makeViewList<SelectionValue>(value: _GraphValue<_PickerValue<CustomPickerStyle, SelectionValue>>, inputs: _ViewListInputs) -> _ViewListOutputs where SelectionValue : Hashable { } }