I do the same (except on Android instead of iOS) and it works great. I have the alerts go to all our TVs (via our Nvidia Shield boxes and https://www.home-assistant.io/integrations/nfandroidtv/) and Google speakers too.
Recently had one of the leak detectors detect a leak and the alerting worked great. Turns out the leak was a bottle of distilled water dripping out the back of the bottle.