Earlier quoted context omitted.
My PiHole is a must for my iOS devices. Yes, there’s a reader mode.
Typically I use my phone when not at home since at home I have a computer to browse the web of course. Is pihole installed on your iphone? Does it work when in a train, in a restaurant somewhere, etc...?
One common example is setting up Tailscale on Pihole and your phone and then you can set the dns on whatever Wifi you’re on to the Piholes private IP