I got a new iPhone 13 iOS 15.5. When I search on App Store for Now TV app it doesn’t show up anywhere. If I search for the app on Google it shows up but won’t let me click on it or download it to my phone. How can I install the app?
I am assuming you purchased the iPhone from a UK retailer and it hasn't been modified ?
I don't own an iPhone or iPad but I am assuming it's set to a UK region in the iOS settings and you are not using a VPN on either your Router or phone.
Have you tried to access the iOS Apps Store on both your mobile internet data and via using your internet off your home Router.
Hopefully an iOS iPhone user on the forum will have more ideas.