I'm opening this as a meta issue to track the documentation status of the DI attributes. I ran into some confusion about AsTaggedItem in symfony/symfony#48532 which prompted me to look for docs which are missing.

• AsDecorator [DependencyInjection] Add as decorator and inner service #16746
• AsTaggedItem [DependencyInjection] Add #[AsTaggedItem] documentation #17694
• Autoconfigure and AutoconfigureTag [DependencyInjection] Add #[Autoconfigure] and #[AutoconfigureTag] documentation #17695
• Autowire [DependencyInjection][HttpKernel] document Autowire attribute #16629
• MapDecorated [DependencyInjection] Add as decorator and inner service #16746
• TaggedIterator [DependencyInjection] Autowire arguments using the #[TaggedIterator] attribute #17652
• TaggedLocator [DependencyInjection] Autowire arguments using the #[TaggedLocator] attribute #17662
• Target [DependencyInjection] Add #[Target] documentation #17696
• When [Configuration] Multiple environments in a single file #16313