[throwaway413]

Native mobile apps could arguably be considered “frontend” such that they are the client the user uses to interface with your backend. Frontend !== “web”. I would say this is where it gets slippery, because previously there wasn’t such a silo between “native mobile aka native frontend” engineers vs “native platform aka backend” engineers. Now there is, and so the term frontend is evolving to mean anything exposing a UI of sorts.

With that in mind, IMO the examples you outlined seem to fit the fe/be full stack paradigm.