Adriaan Dekker shared an update about Google deprecating de-identified URLs (like xyz.anonymous.google.com) in Display campaign reports to align with ads.txt transparency standards.
Now, advertisers will be able to see the actual publisher domains where their ads appeared, even if the placements were previously anonymous.

This update only impacts reporting. Targeting, bidding, and conversion tracking remain unchanged.
Read the official announcement here: De-identified URLs being deprecated on the Google Display Network.