Apple has actually started allowing this. You can find the functionality in an adblocker called Wipr now and it works really well.
URL filters in iOS 26 just make network level filtering more convenient (can use a real VPN at the same time) but it's nothing new in terms of replacement for real ad blockers, which is why apps like Wipr still include a Safari extension.
URL filters in iOS 26 just make network level filtering more convenient (can use a real VPN at the same time) but it's nothing new in terms of replacement for real ad blockers, which is why apps like Wipr still include a Safari extension.