I clearly did not say that.
I said it it likely would be a great experience on a tiny screen.
The LAN option is provided to give users the ability to be entirely disconnected from the BL servers. The Bambu Handy app connects to the servers to provide all the functionality it delivers.
Some advanced functionality is unavailable when using KAN only mode, this is documented.
As I mentioned, the P series also lacks this ability using the screen,
This advanced feature is only available on the larger screen that is included on the current top level model, the X series. You can skip using that screen as it is large enough to deliver a suitable UX.
Whilst I understand you don’t like it that this feature is unavailable when in LAN mode, it is unlikely to change.