You can actually change the icon from settings, and if I’m not wrong, some of them don’t display a prominent tongue or one at all.

But, then again, the app’s name is literally “mlem” which is the cutest and goofiest thing that animals do, which I think you should definitely search on internet if the concept isn’t familiar to you! 🥹 the tongue could make more sense after knowing the context, and probably won’t give those vibes