Created the Sample app widget target in the Xcode project.

Widgets/Attendi/Catalogs/Assets.xcassets/AccentColor.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Widgets/Attendi/Catalogs/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "dark"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "appearances" : [
+        {
+          "appearance" : "luminosity",
+          "value" : "tinted"
+        }
+      ],
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "16x16"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "32x32"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "128x128"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "256x256"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "1x",
+      "size" : "512x512"
+    },
+    {
+      "idiom" : "mac",
+      "scale" : "2x",
+      "size" : "512x512"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Widgets/Attendi/Catalogs/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Widgets/Attendi/Catalogs/Assets.xcassets/WidgetBackground.colorset/Contents.json

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+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Widgets/Attendi/Resources/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>NSExtension</key>
+	<dict>
+		<key>NSExtensionPointIdentifier</key>
+		<string>com.apple.widgetkit-extension</string>
+	</dict>
+</dict>
+</plist>

Widgets/Attendi/Sources/Bundle/AttendiWidgetBundle.swift

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+import WidgetKit
+import SwiftUI
+
+@main
+struct AttendiWidgetBundle: WidgetBundle {
+    var body: some Widget {
+        AttendiWidget()
+    }
+}

Widgets/Attendi/Sources/Intents/AppIntent.swift

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+import WidgetKit
+import AppIntents
+
+struct ConfigurationAppIntent: WidgetConfigurationIntent {
+    static var title: LocalizedStringResource { "Configuration" }
+    static var description: IntentDescription { "This is an example widget." }
+
+    // An example configurable parameter.
+    @Parameter(title: "Favorite Emoji", default: "😃")
+    var favoriteEmoji: String
+}

Widgets/Attendi/Widgets/AttendiWidget.swift

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+import WidgetKit
+import SwiftUI
+
+struct Provider: AppIntentTimelineProvider {
+    func placeholder(in context: Context) -> SimpleEntry {
+        SimpleEntry(date: Date(), configuration: ConfigurationAppIntent())
+    }
+
+    func snapshot(for configuration: ConfigurationAppIntent, in context: Context) async -> SimpleEntry {
+        SimpleEntry(date: Date(), configuration: configuration)
+    }
+    
+    func timeline(for configuration: ConfigurationAppIntent, in context: Context) async -> Timeline<SimpleEntry> {
+        var entries: [SimpleEntry] = []
+
+        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
+        let currentDate = Date()
+        for hourOffset in 0 ..< 5 {
+            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
+            let entry = SimpleEntry(date: entryDate, configuration: configuration)
+            entries.append(entry)
+        }
+
+        return Timeline(entries: entries, policy: .atEnd)
+    }
+
+//    func relevances() async -> WidgetRelevances<ConfigurationAppIntent> {
+//        // Generate a list containing the contexts this widget is relevant in.
+//    }
+}
+
+struct SimpleEntry: TimelineEntry {
+    let date: Date
+    let configuration: ConfigurationAppIntent
+}
+
+struct AttendiWidgetEntryView : View {
+    var entry: Provider.Entry
+
+    var body: some View {
+        Text("Time:")
+        Text(entry.date, style: .time)
+
+        Text("Favorite Emoji:")
+        Text(entry.configuration.favoriteEmoji)
+    }
+}
+
+struct AttendiWidget: Widget {
+    let kind: String = "AttendiWidget"
+
+    var body: some WidgetConfiguration {
+        AppIntentConfiguration(kind: kind, intent: ConfigurationAppIntent.self, provider: Provider()) { entry in
+            AttendiWidgetEntryView(entry: entry)
+                .containerBackground(.fill.tertiary, for: .widget)
+        }
+    }
+}
+
+extension ConfigurationAppIntent {
+    fileprivate static var smiley: ConfigurationAppIntent {
+        let intent = ConfigurationAppIntent()
+        intent.favoriteEmoji = "😀"
+        return intent
+    }
+    
+    fileprivate static var starEyes: ConfigurationAppIntent {
+        let intent = ConfigurationAppIntent()
+        intent.favoriteEmoji = "🤩"
+        return intent
+    }
+}
+
+#Preview(as: .systemSmall) {
+    AttendiWidget()
+} timeline: {
+    SimpleEntry(date: .now, configuration: .smiley)
+    SimpleEntry(date: .now, configuration: .starEyes)
+}