Same with 2020 iPad Pro 12.9"

Just tried to install on Intel MacBook external drive. Like expectedly it works.

Thanks for confirmation. So basically I have to subclass UIView and implements UITextInput to start with? On Mac, this may mean subclassing NSView and implements NSTextInput / NSTextInputClient?

You need to first use Xcode 14 beta, then embed the Swift Charts (which is SwiftUI view) to your code using one of the bridging tools below https://developer.apple.com/documentation/swiftui/swiftui-views-displayed-by-other-ui-frameworks

I'd love to see a pie chart as well, which can be used in Lock Screen circular widget. However, this doesn't seem possible just yet.