Title and Description ShareSheet

You may use UIActivityItemSource with LPLinkMetadata.

Prepare a class inheriting UIActivityItemSource somewhere in your project:

import LinkPresentation

class MyActivityItemSource: NSObject, UIActivityItemSource {
    var title: String
    var text: String
    
    init(title: String, text: String) {
        self.title = title
        self.text = text
        super.init()
    }
    
    func activityViewControllerPlaceholderItem(_ activityViewController: UIActivityViewController) -> Any {
        return text
    }
    
    func activityViewController(_ activityViewController: UIActivityViewController, itemForActivityType activityType: UIActivity.ActivityType?) -> Any? {
        return text
    }
    
    func activityViewController(_ activityViewController: UIActivityViewController, subjectForActivityType activityType: UIActivity.ActivityType?) -> String {
        return title
    }

    func activityViewControllerLinkMetadata(_ activityViewController: UIActivityViewController) -> LPLinkMetadata? {
        let metadata = LPLinkMetadata()
        metadata.title = title
        metadata.iconProvider = NSItemProvider(object: UIImage(systemName: "text.bubble")!)
        //This is a bit ugly, though I could not find other ways to show text content below title.
        //https://stackoverflow.com/questions/60563773/ios-13-share-sheet-changing-subtitle-item-description
        //You may need to escape some special characters like "/".
        metadata.originalURL = URL(fileURLWithPath: text)
        return metadata
    }

}

And use it like this:

        let title = "Jokes Are Us Diagnostics:"
        let text = "Some Text"
        // set up activity view controller
        let textToShare: [Any] = [
            MyActivityItemSource(title: title, text: text)
        ]
        let activityViewController = UIActivityViewController(activityItems: textToShare, applicationActivities: nil)
        activityViewController.popoverPresentationController?.sourceView = self.view // so that iPads won't crash
        
        // exclude some activity types from the list (optional)
        activityViewController.excludedActivityTypes = [ UIActivity.ActivityType.airDrop ]
        
        // present the view controller
        self.present(activityViewController, animated: true, completion: nil)

As far as I tried, this may not produce the expected result if you add other items into textToShare.

It worked, but the icon isn't showing. Any ideas?