Inspector

• This show views of selected content.  For example a keynote side bar showing you about a selected item
• This is available on macOS, iPadOs, and iOS, which includes programatic control of presentated state and width.
• It is an structural API like NavigationStack or .popover
• To add an inspector – you have a bool binding, and add the content in the trailing viewBuilder
• Inspector uses Group style by default, they are not resizable by default, but you can add .inspectorColumnWidth( with an ideal value ) changes are handled by the system and retained across app launches.
• It has different behaviors based on content it is attached to, this impacts toolbar placement and overall UI characteristics. On MacOS it is a bit easier.  If you are using a splitView it should be placed in the detail section.

Presentation customization

• In iOS16.4 there are new features and they are also enabled for Inspectors
• .presentationBackground( ._: )
• .presentationBackgroundInteraction(._:) 
• .presentationCornerRadius(_:)
• .presentationContentInteraction(_:)
• .presentationCompactAdaptation(_:)