Shortcut URL that only partially works

Being a new user, the forum won’t let me add any more replies to the other thread about HomeKit URLs not working so here is a screenshot of the shortcut I was testing with that I referred to in the other thread. Today when testing it with the URL in safari on my iPad, this fired a notification on my iPhone but not the iPad. I suspect only reason it didn’t work in iPhone last night was notification quiet hours set on my phone. Still not clear why it’s not working on iPad.