Minecraft on the 2021 iPad Pro does not render worlds correctly on the X-Axis. Regardless of the render distance setting, the X-Axis render always stays at a fixed width (moves exactly with the player and does not fog/render chunks). At a certain point, the rendered world looks like a very long rectangle instead of a square (or circle from distance fog). As the player moves up, the width of the rendered area gets smaller on the X-Axis until Y=258, where the entire world disappears on a superflat world.

The Z-Axis rendering works perfectly and can render up to 56 chunks on the 2021 iPad Pro.