Trying it out currently. Typing the comment has a bit of a latency and I think other apps are better to navigate with one hand only.
It's in alpha, but for that, its really not bad. Recommend trying
Edit: Also I noticed, that I cannot report comments of others and edit mine. That makes it difficult to be THE Lemmy app for now. But as I wrote earlier, its in alpha and the developer mentions that (including, that it has some limitations) on the github project page, linked in the comment above
Edit 2 (Update): Now editing works too! (Editied from wefwef)