Wipr 2 uses Apple's new 'URL Filters'

No because it only covers the URLSession API and WebKit:

Network Extension URL Filter examines all URL requests sent via WebKit and the URLSession API.

Apple Developer Documentation

URL filters | Apple Developer Documentation

Create a filter that analyzes full URLs, while preserving privacy.

There’s a voluntary Participation API for apps that don’t use those:

For browsers or any app that doesn’t use WebKit or URLSession, use the NEURLFilter Participation API to voluntarily check URLs.

There just needs to be a proper user-facing network permission at some point. Chinese iPhones actually already have this permission and they have for many years.

It’s kind of bizarre that they have a permission locked to one region when it seems to cause issues with some developers’ apps because they don’t even know it exists.