To enjoy the convenience of controlling your WiiM device with Siri, you'll need to add it to the Apple Home App. This process is straightforward. Here's how you can do it:

Adding Your WiiM Device to the Apple Home App

Here is the step-by-step guide

  1. Open the Home App: Start by launching the Apple Home App on your device.
  2. Initiate the Addition Process: Look for the '+' icon located in the top right corner of the app and tap it. This action opens a menu for adding new accessories.

  3. Choose 'More Options': Instead of selecting 'Scan a Setup Code' or the option to 'Hold iPhone Near Accessory,' tap the yellow 'More options...' button. This will lead you to a list of available devices.
  4. Select Your WiiM Device: From the list of accessories, find and select your WiiM device. It should be listed under 'Select an Accessory to Add to Home.'
  5. Follow On-Screen Instructions: The app will guide you through the remaining steps. Follow these instructions to complete the setup of your WiiM device.

Once you've successfully added your WiiM device to the Apple Home App, you can effortlessly control it using Siri voice commands, making your experience more convenient and enjoyable.

Please select the yellow "More options...?" in step 2. 

There is also a video tutorial here for your reference. Please check it out. 

Please check this article if you want to add or remove your AirPlay code.