I made a folder with my fav lemmy apps that I tried so far, and they are sorted by favorite to less favorite. By far, wefwef is my most used and I do switch to lifoff sometimes. Also, the official lemmy app is really not bad compared to reddit's official app. I would say try all of them and see which one works the best for you. waiting for sync and boost to launch. let me know if you have any other suggestions I haven't tried yet.
Since Lemmy is not a single entity but a group of people hosting the servers, there is not official app.
Your question is similar to "There is no official email app?".
There are hosts like Outlook and Gmail. Similarly, Lemmy.ml and Lemmy.world would be the equivalent. While outlook and Gmail have their own apps, individual instances rely on third party apps like Jerboa, Liftoff, etc. for mobile users.
I've been liking Wefwef too, but does anyone else have the problem that you can't view the list of your own posts in your account? Or is that something that broke on the instance my account is on?
Ok, then it's not only me. Leitmotif is easily the best looking of the bunch, but if it's read-only and I can't even customize what content it's showing me, it's sadly pretty much unusable right now.