Like there is the Official Mastodon app for Mastodon, and Element app for Matrix, which app is considered the most official lemmy app for Android [possibly also for ios]
Or atleast, the app which supports most(if not all) the features available in Lemmy
Jerboa is notably not the official Lemmy app. It is made by the Lemmy developers, but they do not consider it to be any more official than any other Lemmy app.