I've been testing DuckDuckGo's App Tracking Protection (beta) for the past 24 hours.
Here's a small comparison between #Twitter #Mastodon and #Bluesky (with about equal usage/screen time).
Bluesky is by far the worst with almost 2200 tracking attempts.

Edit: I'd just like to make clear that this beta can be used by anyone with the regular DuckDuckGo browser app (on Android, don't know about iOS).