Middle Mouse Button Does Not Pickblock On iOS/iPadOS

Clicking the middle mouse button/scroll wheel does not perform the pickblock action on iOS/iPadOS. Re-mapping pickblock to a different button, such as the P key does work.

Steps to reproduce:

1. Open up Minecraft Preview 1.19.10.20 or 1.19.10.21 on iOS/iPadOS
2. Connect a mouse to your device
3. Make sure that the button for pickblock is set to button 3
4. Open up a world
5. Try pickblocking with middle mouse button. You will see that it does not work, even in creative mode.