Hey siri not hearing me

My hey siri doesnt work. I followed a guide on how to fix it. I turned the “hey siri” off and on again but when i say hey siri (to set it up) it doesnt hear me at all but it still picks up sounds from elsewhere… ive blowed into the mic, ive removed my case, all sorts.

Yet if i press the power button to bring up siri it hears me when i give it a command… 🤷🏼‍♂️