Add missing required property to Parameter

discord/app_commands/commands.py

@@ -512,6 +512,10 @@ class Parameter:
     def display_name(self) -> str:
         return self.__parent.display_name
 
+    @property
+    def required(self) -> bool:
+        return self.__parent.required
+
     @property
     def description(self) -> str:
         return str(self.__parent.description)