Apple must have changed something on their side. They have some domains they test for to see if the network is compatible with their Private Relay feature. Previously, when " iCloud Private Relay" was enabled, users got a message when they blocked those domains by Pi-hole that their network is not compatible with that feature. Later, they just seem to ignore the blocked domains and ads were loading
The feature was renamed meanwhile
- In earlier versions of iOS, iPadOS, and macOS, this preference is called iCloud Private Relay.
Now it seems they changed something again...