Integrate service call into Home app

Hello,

I’m absolutely new to Home Assistant and I’m very enthusiastic so far. However, I have been trying for some time to integrate the execution of a service call into my Home app so that I can then also execute it via Siri. I have now managed to start the service call via Siri using an iOS shortcut, but I would like it if I could also start it via a button in Home. In Home Assistant itself, I was also able to link the service call to a panel, but unfortunately I can’t figure out how to link this to the Home app using Homekit Bridge.
It’s probably not a particularly difficult task and I would be very grateful for any advice.

Many thanks in advance