All iPhone models have been rated at least IP67 and above since the release of the iPhone 7. This includes Apple's entry level second-generation iPhone SE. Apple lists all current devices as "splash, water, and dust resistant" under controlled laboratory conditions. This means current iPhone models are safe from accidental spills from common liquids and should survive being submerged at a maximum depth of 4 meters fo up to 30 minutes, depending on the model. Check below for model ratings:
The iPhone 13 only ships with a USB-C to Lightning Cable and nothing else. Apple stopped including accessories in the boxes of its devices with the launch of the iPhone 12. Early iPhone models used to ship with earpods and a wall charger. Apple said it no longer includes accessories in an effort to cut down on waste. Most iPhone owners already own headphones and chargers.
Apple stopped including accessories with its devices at the launch of the iPhone 12. The given reason was to reduce waste since most iPhone users already own their own headphones and charger. All iPhone models released after the iPhone 12 only ship with a Lighting to USB-C cable. This means you will need to provide your own earpods/headphones and wall charger if you don't already have them.
No Apple products ship with AirPods. The wireless earbuds are sold separately through apple.com or third-party providers such as amazon.com.
Nothing is officially known about Apple's next generation device, but experts assume that the iPhone 13 will be released in four models like its predecessor the iPhone 12. Apple released the iPhone 12, iPhone 12 mini, iPhone 12 Pro and iPhone 12 Pro Max in the fall of 2020.