1. Open VRChat on mobile
  2. Visit a cool world that uses the VRCBCE prefab (the pool table)
  3. Start a game of pool
  4. Pick a cue
  5. Press E to open the flatscreen game window
  6. What do you mean you can't press E
  7. Cry a lot
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The Android version has no way of triggering Input.GetKeyDown calls without plugging in a USB keyboard (at which point it works fine!)
The Android version also does not handle cursor position (emulating a mouse), which blocks using the VRCBCE table's top-down view without plugging a USB mouse in (at which point it somehow still works fine).
Yes, our team will look into finding a way to ensure our next major release works as well on Android flatscreen as possible, but these two input vectors are supported by VRChat on Desktop and it should be like-for-like as much as possible.