Hi! Linking Siri with the Lyra music app on your iPhone running iOS 18.6 is definitely doable, and I can guide you through the steps.

Just to clarify—are you looking to have Siri play songs directly from Lyra when you ask, like "Hey Siri, play [song] on Lyra"? Or are you just wanting to open Lyra with Siri commands? This will help me provide the best instructions.

If your goal is to have Siri use Lyra as your default music app for playback commands, here's how you generally do it:

1. Make sure you have the Lyra app installed and updated on your iPhone.
2. Invoke Siri by saying "Hey Siri" or holding the side button.
3. Ask something like "Play [song or artist] on Lyra."
4. Siri should then prompt you to confirm using Lyra as the default music app for those playback requests.
5. Confirm by saying "Yes," and Siri will remember this choice going forward.

If you do it the first time, it should prompt you to set Lyra as the preferred app automatically, similar to how it handles Spotify or Apple Music5.

If for some reason Siri does not prompt or recognizes Lyra, double-check that Lyra supports Siri integration, and the app permissions allow Siri usage. You can check this by:

- Going to your iPhone Settings.
- Scroll down to Lyra.
- See if "Siri & Search" is enabled with options like "Use with Ask Siri" turned on.

If you want, I can walk you through these settings step-by-step. Let me know how the Siri commands respond after trying the first steps, and we can troubleshoot further if needed!