In there a way to apply the glass effect to an Image with for example ForegroundStyle?

To apply a glass effect to an image using something like ForegroundStyle, you can use the NSGlassEffectView in AppKit or the UIVisualEffectView in UIKit. These APIs allow you to apply a glass effect to your content, including images, by setting the content view of the glass effect view to your desired view.

For AppKit, you can use the NSGlassEffectView as follows:

Create an NSGlassEffectView for each element you want to display with a glass effect.
Set the contentView property of the NSGlassEffectView to your image view.
Add the NSGlassEffectView to your view hierarchy.

For UIKit, you can use the UIVisualEffectView:

Create a UIVisualEffectView and configure it with a glass effect.
Set the contentView of the UIVisualEffectView to your image view.
Add the UIVisualEffectView to your view hierarchy.

These methods allow you to apply a glass effect to images and other content, providing a visually appealing and interactive layer in your app's UI. For more detailed guidance, you can refer to the session Build an AppKit app with the new design and Build a UIKit app with the new design.