Ah, sorry, it's in the context of what Elena Rossini writes about the limitations of the mobile app.

As PeerTube draws content from independent servers, it's hard for them to comply with the content policies of Google and Apple. The PeerTube app you can find in the App Store or Google Play Store therefore only contains content from a very short list of whitelisted PeerTube instances, where Apple or Google have accepted content from these instances to be presented in their app ecosystems.

F-Droid doesn't have such limitations, and as a result the stuff you'll find in the F-Droid app is the same as you'll find in https://sepiasearch.org/ .